Secrets of Quantum Radar - Prof Simon

[@francoisleveille409]

The F117/A which was shot down in the Balkans had its weapons bay doors opened when it happened. It was therefore visible to normal radar when this happened. The people operating the radar for the SAM realized every time the stealth fighter was sent on a mission, at some point the doors had to be checked and it became as visible as any other aircraft when this happened. It's not because Russians or Serbs had any special technology.

[@joaogoncalves7762]

Was about to say exactly that. 👍

[@WaukWarrior360]

They also got lazy/complacent and kept flying through same route repeatedly. The Serbs knew where it was going to be and that they could aim when it's weapons bay was open. All they had to do was wait

[@francoisleveille409]

@@WaukWarrior360 This is a valid point I also mentioned to some Russian saying their radars are "so much better and can detect US stealth aircraft". ... yeah right.

[@davidryder3374]

"With unmatched stealth,** the F-35 can go where no other fighter can go." **Except the F-22, which was more stealthy, yet nobody seems to remember that.

[@KaiLastOfTheBrunnen-G]

The YF-23 was even more stealthy than the YF-22.

[@christopherwhitney2711]

Just mentioning that in Australia Jindalee Over the Horizon Radar was tracking an F117 flying over Papua New Guinea some years ago when the US was making a flight around the equator to test that it couldn't be picked up by ground based and airborne radar. However these work looking up or are airborne and are in the microwave range of frequency. The Jindalee radar looks down from the ionoshere in the HF range. As a side issue the radar forms one of three installations of Jindalee radar network in 3 specific locations. They can detect aircraft and ships over 13,000kms square. So it's said that from Jindalee station they can detect aircraft that are flying out of Hong Kong. Which makes me think they could of tracked MH370 if they knew which aircraft it was. The Russian and Chinese are aware of this technology of course.

[@tucker2074]

As a Russian general in Syria pointed out, there is no such thing as an invisible aircraft

[@JimCOsd55]

Tucker ... no one has claimed that F-35’s are invisible, they’re designed to be “low observable “! All radars suffer from the same problem, the inverse square law, as you double the distance, the power drops 4 times. This also effects the return signal, as you double the distance it also drops 4 times on its return so that it is now at 1/16th the power! This is why the S-400 has multiple radars, they use the S-band and L-band radars for their lower frequency and longer wave to see further. They can detect large planes with an RCS at 100 m2 like B-52’s and AWACS out to 400 km. While smaller fighters as in F-15 and F-16’s with an RCS in the 5-25 m2 RCS can be detected out to 160 km. Down to detecting an F-18 at 1 m2 RCS out to 100 km. The F-35 at .005 m2 RCS is designed to defeat this from the front aspect. But those are acquisition radars, they may detect a target but they can only say that they are somewhere in this 10 km area, not a weapons quality track. For that the S-400 uses higher frequency fire control radars in the C, Ku and X-bands. These are the radars that the F-35, F-22 are designed to beat, if the radar can’t tell the missile the range, course, speed and altitude of the target, the operator would be shooting blind if he launched!?? Nor is that the F-35’s only defense, it’s powerful APG-81 AESA Radar is also capable of jamming as well as giving false targets. Along with firing or controlling the firing of anti-radiation missiles from other aircraft at SAM sites. Nor would F-35’s go in alone, F-16 Wild Weasels and F-18 Growlers would accompany them all being controlled by AWACS! So it was never about being invisible but instead being low observable, to be able to get close enough to launch weapons before being detected!!!

[@staubsauger2305]

Nobody claims they are invisible. That's not what stealth means. a lower cross section simply means you have to get close to detect it. The Russians believe in stealth which is why they are investing in the Su-57

[@andrewheagwood5950]

Maybe not yet, but as we delve into nano technology, we'll get damn close

[@jubeiorigami4096]

@@JimCOsd55 actually the F35 was designed to slip past the S300 so Russia countered by building the S400 which is designed to shoot down stealth. It's a Fact the S400 didn't even exist at the times the F22 and F35 were designed and deployed. So the F35 and F22 were never designed to defeat the S400.

[@JimCOsd55]

Jubei Origami ... true, the S-400 is an improved S-300, it’s biggest difference being that it uses 4 different missiles for targets from 30-380 km range. The 92N6E engagement radar is also new and improved but the S-400 also uses the same 96N6E acquisition radar as the S-300! Which proved unable to acquire Israeli F-35’s over Aleppo when the Syrians attempted to fire missiles at them! Which then implies that the same acquisition radar won’t work any better for the S-400!??

[@stewartboyle4910]

Love the fact you're making longer films.

[@johnsweeney6072]

Imagine if all the worlds cost of war was put into bettering the world and mankind how far more advanced we would be.

[@cancelanime1507]

Unfortunately it’s not that easy..

[@ianfarr-wharton1000]

The US and Australia have been working on Quantum Radar for 25 years in Australia.. China stolid some of the technology from the CSIRO 5 years ago... We have been told that China is 10 years behind the US and Australia with Quantum Radar ???

[@johnsweeney6072]

Ian Farr-Wharton that makes me feel better the fact that I’m here in aus 🇦🇺

[@johnsweeney6072]

Saiah smeth yeah I no that it’s just crazy the budgets for arming the world when there’s people starving and living week to week or day to day cheers

[@evanhorn6658]

This isn't Narnia ignoramus this is reality where man is evil and power hungry

[@davidsweeney111]

The idea that the 13.8 billion light year observable universe is an emergent artefact of an underlying non-spatial non-temporal quantum reality is surely the most mind-blowing concept of modern physics.

[@aardque]

Quantum physics teaches us that the entire known universe is composed of waves, which reflect, or are attenuated by...something. This entire universe is like a radar trace, a reflection of the true reality. Anyway, back to my Gooble Box.

[@geemailMossman]

True....

[@alangeisdorf4198]

but that's only if you look, remember its the observer who breaks down the wave function. Einstien called it spooky action but i'm not sure of that. I think it has more to do with creepy universe than spooky action,

[@TheAussieRod]

The Universe is a thought lived in a constant loop

[@spencerhardy8667]

Feynman's crazy concept that there is only one electron keeps bugging me.

[@miaudottk9080]

No quantum radar was used in Yugoslavia to down that stealth plane. The radar station went passive and tracked gsm tower reflections. edit: this is info I got from TV news.

[@ProfSimonHolland]

Thank you

[@roisingtommy]

The f-117 shot down was because of a faulty weapons bay that compromised the stealth features.

[@buttert5091]

The same way the Patriot and numerous US assets were 'looking' in the wrong direction right, and a perpetually sanctioned country was able to defeat the 'best' of the best equipment. No country or tech is infallable,

[@yfelwulf]

It was shot down because they baited it with a Microwave Oven left in the open it returned for a look and got shot down no faulty BAU.

[@jubeiorigami4096]

@@Morawka1 Lol that's a lie. It was shown and there where Patriot batteries deployed that they covered all of the North West of Saudi Arabia where the supposed Iran attack came from. But we all know it was the Houthi Rebels who launched the Attack. The US and its lap dod allies lied because they need any excuse to blame Iran. Usual US Strategy... Blame others without producing a shred of evidence.

[@goranwinn312]

@@Morawka1 yes probably is true, false story as all others... So by your logic we dont need anymore look who destroy twin tower, we got confirmation from start...I am secure anyway all way along that was inside job, but for sure planes was made and build in USA... So we got veryfication from first minute large as house who was guilty

[@buttert5091]

@@Morawka1 Contiune to live in the dream of American Military infalability, Despite evidence Common sense should just dictate that no weapons platforms is undefeatable. Just to dig deeper into your theory, 1. Saudis dedicated all their Patriot assets to protect airspace facing Yemen, even though the scarier and closer Iran is just behind you. Thats seems like poor military planning. 2. Apart from the Patriots there should be CIWS as last ditch defences for close quaters, 3. US has several navel ships, drones, Satellites assets etc and they still could not detect such an attack using knock of Russian Kaliber Kruise missles. So tell me what is your explanation, mine is, the tech does not work as advertised and more effort should put into coutering such threats, if it does not work, then it does not work

[@lafeeshmeister]

Unless there's something I'm missing: 1) It's publicly recognized that under some conditions the F-35 (or other stealth aircraft) can be tracked without "quantum radar." Factors to consider are: open bomb bays, low wavelength radar, proximity of aircraft, etc. You can also track something by visually/audibly identifying it, the same way the Brits did with observers to back up their ground-based radar during the Second World War. 2) Development of "quantum radar" may have occurred beyond the initial scientific discoveries reported by the Chinese, Russian, and international teams - but military applications do not appear to be specified in the public domain. 3) Therefore, because quantum radar is not necessary to track the F-35, the statement at 8:22 - "that means they have quantum radar" - is an unwarranted leap. I'm not saying you're wrong; I'm saying there's no way we can know if you're right. The rest of the video was great.

[@ghostindamachine]

Prof Simon, you sure have a great gift in how to transfer knowledge in a clear and consistent manner.

[@markam306]

The F-117 that was shot down by Serbia was on a bombing mission. The radar started tracking when the stealth fighter opened its’ bomb bay doors to release the bombs. When these doors are open the stealth does not work and the exposed internal structure reflect radar waves. The USAF was using the same route into the target area for several nights in a row. A sharp radar operator began anticipating the bomb release point and time and was waiting for his radar to “light up”. It was a normal air defense radar.

[@ProfSimonHolland]

great info.

[@tastyfrzz1]

So couldn't there be quantum digital communications? Meaning that there would be no lag from Mars to earth?

[@davidmyersretiredaerospace8038]

No human on mars for a reply ha ha.

[@TealJosh]

Information can't travel backwards in time. If you observe the pair in mars before the time has had enough *time* to reach it, the wave function collapses and information is lost.

[@MrFlatage]

@Mark A Toffle Time is a very human concept. Can you prove time exists? If not the answer is quite simple. With quantum communication there is no traveling, no wave and it is instant so time is not even a factor within the entanglement. And ... you can spin so basically get a zero or one digitally. It's not a landline and you'd need millions of entangled parts just to match a ye old telephone modem. You would also first need a satellite to go to Mars first before it works. But there would be no time delay. The phone would ring but instantly.

[@obvioustruth]

In practice you can't send information faster than light. Entire process can't be faster than speed of light or if it is faster than speed of light then not all information is transferred faster than light, and therefore it is useless.

[@davidmyersretiredaerospace8038]

When you die time no longer affects you.

[@Adenzel]

The Australians have had a radar system that could detect stealth for decades. Afaik it used atmospheric tricks to accomplish this, but obviously details about how it actually works are classified. Afaik they wouldn't share it with even the U.S. as the U.S. wasn't willing to share it's secrets with Australia. I have no idea what the current state of things are regarding this radar and if it's still effective.

[@jon782]

You don't need quantum radar to detect stealth any low wavelength radars which were the first radars to be used can do this. The problem is they have poor resolution/ tracking. Its difficult to target a missile at the radar return.

[@tonykennedy9811]

Absolutely marvelous video !! As a retired RAF Airman I found this very interesting to see how quickly the world is moving in military technology 👍

[@NeuronalAxon]

How advanced did it seem when you were serving?

[@tonykennedy9811]

Pretty amazing bit of kit considering the age of the aircraft lol

[@effingsix3825]

Professor Holland - The F-35 changes the geopolitics of the Middle East, since no detection of quanta is available to proxy nations. For example, Russia would not allow quantum radar to be used in contested regions, such as the Ukraine, or Iran. All of which are in the same geopolitical theatre. There were two incidents of civilian aircraft being shot down by the same Russian anti-aircraft equipment, however. One was the Malaysian 777 carrying many Dutch citizens and one was a Ukrainian 737 carrying many Canadian citizens. In both cases I would say these were not accidental collateral casualties. The F-35 strategy is to go undetected behind other A/C by A/C radar because of the wavelength, within the radar image of a much larger aircraft. It could very well be that the F-35 is in use into foreign airspace by following behind civilian A/C, either British, Israeli, or U.S. F-35s. Most likely the Iranian ICBM site that was destroyed was by an F-35, using this method. A detection method using the original equations from the Russian scientist that discovered stealth by using angled surfaces could probably be used by cell phone towers over a wide area, compiling the returns with the exact same equations in a distributed fashion. The interest for this capability comes from Operation Out Of The Box, which destroyed a weapons grade nuclear reactor in Syria using conventional means. If the Russians or Chinese actually had this quantum capability, they could pick out low frequency returns from great distances. The problem would be ‘painting’ adversarial aircraft from great distances. This kind of equipment would also be easily detectable from great distances, if it were in use. I think any false claims by Russia or China are probably cointel. You would probably have to resort to shorter wavelengths once an aircraft is detected, then the jig is up. More likely than not, NATO aircraft can be picked up by pinging the cell phone in a pilot’s pocket which he forgot to switch off, or doesn’t as a habit.

[@JonathanHallOverAllen]

So awesome. Guess the tactic then would be to flood their skies with fleets of "quantum decoys" at low altitudes to confuse "quantum radar" installations and at high altitudes to confuse conventional SAM sites as well, send in tomahawks, EA6Bs, EF-18s, F-15Es, B1s, and A10s with some B52s and just do it the old fashioned way?

[@Skyflower44]

Ooooow Quantum Radar 👍🍎Catching up on your channel content Sir🤗👍👏👏

[@garyhughes4326]

Can you tell me please Professor if you have done anything on the "micro realm"? The area of science that delves into what lies beyond the sub atomic level. How small can we go is essentially what I am asking? This quantum physics theory is an area that interests me greatly. We tend to concentrate our attention on the "macro realm" but surely if we go in the opposite direction it is as infinite in it's counterpart. There is no limit, it is infinate. Just trying to get my mind around it gives me a headache :-( I imagine that you would have covered this subject at some stage and would like to hear your take on it and as we all know"the truth is out there". Now, where did I hear that term? Have a nice day Professor and both you and Dorothy stay safe. Greetings from Down Under. Regards From Gary.

[@jock-of-ages73]

A German company tracked 2 F35s for 100 miles after they took off to return to base in the US, from a pony farm of all places. Apparently they used something called 'passive radar', which analyses how civilian communications bounce off an airborne object. It has no emitters so pilots don't know they're being tracked. It's only Achilles heel is that it relies on civilian communications to be able to track them. I'm not sure how it would work against a B2 or F117, but i'm sure this small German company would like to know too. Oh and the Americans too, no doubt.

[@gregorylewis4404]

no, the f-117 that was shot down had its bomb bay doors open, thereby giving up its stealth coverage and making it visible to a very standard SAM radar

[@igbc176]

sore loser excuses of USA militars

[@DummyFace123]

This is wrong. Entangled particles do not communicate. When particles become entangled, all it means is that they now share an inverse spin, and you can think of them like RSA keys. The keys do not communicate, they just share the same data. If you were to alter the spin of an entangled particle, nothing is “communicated” faster than light, all you’ve done is disentangled the particle. You can think of it as corrupting one of your RSA keys. Corrupted one of you’re RSA keys did not cause the other one to corrupt as well.

[@ProfSimonHolland]

Well explained...thank you

[@joemazzarella5731]

That’s a bit of semantics in the absence of any understanding of the mechanics of the correlate relation. So, it is not “wrong”. Moreover the RSA key analogy is sui generis because it uses the principle of one way hash algorithms, meaning absent the key the original message content can not be reconstructed through reversing the operations without extraordinary time. Meaning, a one way function bears no equivalence to a symmetrically inverse pair that maintains it symmetry while changing state. The argument against the faster than speed of light assertion is premised on the idea that the first instantiation of an entangled pair is a spatially local or proximate event and to achieve physical separation in order to take advantage of any instant information transfer at long distances first requires the pair be separated and transported in spacetime. As such they must obey the speed limit. Where this argument loses its footing is once separated, the not understood mechanism can send and receive data “ faster than the speed of light” thereafter, as long as the entangled relation persists. The actual question is once the initial speed of limit penalty is paid is there effectively an infinite free pass between point A and B, suggesting information while conventionally encoded in a time space delimited medium (EMR for example), has an independent existence. So, I would cut the professor a break. His description is as good as any when describing a phenomena we don’t understand.

[@ProfSimonHolland]

I am supposed to be wrong....that’s the idea....and why you can correct me.

[@bradraymond5502]

@@ProfSimonHolland I wish more people where this humble about their knowledge

[@nikh93]

You are right Hokibukisa. Totaly agree with you. All other folks out there: be carefull with what you beleave in. Professor Simon is using some fancy words to sound educated, but actually he is probably influenced by the Dunning-Krueger Effect.

[@juhavitikka9590]

This wikipedia article of quantum illumination is propably relevant for the technology discussed in video: en.wikipedia.org/wiki/Quantum_illumination It doesn't explain everything but according to this wikipedia article quantum entaglement can be used for quantum radar. The quantum entanglement doesn't have to last all the way. It's remenant effects can be found in correlations between reflected and idler signals.

[@mostumpy]

If the paint on the stealth airplane cannot absorb the quantum particle then it follows that the particle cannot hit the paint. It's long wavelength would be just like cosmic rays that pass through everything. Unless your 5 miles deep in an abandoned coal mine with super sensitive detectors trying to capture Muons hoping that sufficient numbers of Q particles would hit enough structure to paint a picture is unlikely.

[@igorica]

F177A was shot-down over Serbia in 1999. It was tracked by P15 or P18 radar (UHF/VHF), however, it was shot-down by SA-3 Goa (entered service in 1963!) that uses a microwave targeting radar and the target was very visible... Also, note that due to NATO air superiority, the whole process of the target acquisition and missile launching had to be done in under 20 seconds, otherwise, the SAM crew might be hit by AGM-88 HARM.

[@ProfSimonHolland]

Great information

[@DevinHeaps]

The key to overcoming quantum radar is multiple entanglement or quantum scrambling.

[@briananthony4044]

Stealth is designed to hide from certain radar frequencies used by the military. S band and X band come to mind. Fighters, SAMs, warships use these bands because of various advantages they bring. Their very high frequency permits a very detailed return that is like an old black and white TV screen. Very high resolution allowing the radar to distinguish type, size, speed, heading etc of target. They can map the ground like an aerial photo, they need only a small radar dish, etc. BUT the easiest way to counter them is to use lower frequency radar of the type used in the 50s and 60s. They are the ones that give a simple blip on the screen, not very informative, but if your high frequency radar says nothing is there, and your low frequency gives you a blip, you know you have a stealth aircraft. I noticed that a lot of Chinese warships have both types of radar.

[@briananthony4044]

Here's a vid on low frequency radar from WW2 and the time after. These should pick up a stealth fighter or bomber, and with modern computing, give an informative reply from the return signals. kzbin.info/www/bejne/ioPNgqSmfL9sjdk This shows what I believe is the LF stealth locating radar on a Chinese destroyer kzbin.info/www/bejne/lWHJk6qcrpZ0rsU see 0:42 with the white building behind it. Not currently rotating. Also at 1:08 Also see kzbin.info/www/bejne/qKPViZqdqJiZgrM at 1:15, left of screen.

[@dananorth895]

Interestingly in Iraq civilians said they knew when the stealth aircraft were flying because their TV's/antennas would pick up a pecular static on screen.

[@phizicks]

that makes no sense at all. If they sent off an entangled particle out into the air, measuring the local side would affect the remote side anyway and same either way. Entanglement cannot be used to send information as it's portrayed here.

[@Nork490]

"Both the Chinese and the Russians have said we can track the F-35. That means they have quantum radar." ...Well... I think its more likely that Russia and China have claimed to have quantum radar, but probably don't. "A Russian radar managed to guide a surface to air that shot down a US stealth fighter. The only explanation is that the Russian radar used extremely long wave lengths that the stealth fighter could't absorb or reflect." Not to sound antagonistic or mean, but these statements seem like weird jumps in logic. So... the purpose of stealth is NOT to be invisible to radar and other sensors. The purpose of stealth is to go undetected long enough to get off the all important first shot. The frustrating thing about modern warfare is that whoever gets the first shot is usually the winner, and it leads to doctrines such as preemptive strikes which puts us in the awkward position of having to attack first. No one in the military hierarchy is claiming that our stealth assets are completely invisible to radar, because they aren't and they don't need to be. They just have to be undetected long enough to get in the first shot. Another thing to consider is that there is a difference between 'detection' and 'locking on.' Locking on is usually much more difficult. Just because you can detect something doesn't mean you can get your missile close enough to destroy it. Stealth makes both of these aspects difficult. Stealth not only makes the aircraft harder to detect, but it also makes it harder to target. Now, the incident with the F-117 involved more than just Yugoslavian air defense turning on the radar and shooting it down. Lt. Colonel Zoltan Dani of the Yugoslavian Army, the one credited with downing the plane, knew what he was doing. He did textbook perfect detective work and was able to predict when and where the Nato airstrikes would come with a degree of accuracy. He listened in on Nato communications, he looked at weather data, and flight planes of other nato planes, etc. He was a competent adversary basically. Stealth aircraft are most vulnerable to detection when they open their weapons bay. Usually when a stealth aircraft opens its weapons bay, then the target is already doomed and its too late. Not this time though. Zoltan was able to catch the F-117 with its weapons bay open. Zoltan took the shot. That's warfare. Does Russia, China, and the US have quantum radar? I'm going to say no, because as another commentator pointed out, quantum radar is hard. Plus its 90% a myth that we have lots of secret weapons that nobody but the military knows about. Weapon systems aren't generally classified, but capabilities are. For example, the sensor pod on the front of an Apache, its obviously a sensor pod, but nobody outside of the pilots themselves and the military hierarchy know just what those sensors are capable of, their range, etc. If we had quantum radar we would likely know about it, but how capable it is would be a mystery. What do I base these assertions on? Simple logistics. A true secret weapon is difficult to keep secret. It can be done, sure, I mean the Manhattan Project was largely secret, but then, just look at how much work they had to do keeping it a secret. Entire secret towns were built to keep it secret. Stealth aircraft themselves were secret for a time, but the military did eventually get around to telling us about them after it was clear that stealth worked and that we would be building more of them. Its difficult to keep big and noticeable secret weapons hidden. What happens if a secret weapon breaks down in the field? You need people to retrieve it while hiding it from as many eyes as possible. You also need a team of specialists with high security clearance that know how to repair it and heck, even just transporting it from one place to another becomes a delicate operation. Oh, and don't forget that Congress really hates it when they don't know what they're paying for. Again, all of this can be done, and has been done, but the military knows that its easier to keep capabilities secret verses entire weapon systems. I could be wrong, but that's just my 2 cents.

[@nighthawkviper6791]

We now have living google search bytes. Wonderful idea, even better execution. Great tool.

[@stephengray9207]

It's a truly interesting proposition. For anyone doubting this quantum theory, it is not hard to make a demo of splitting a beam with parallel slots in a filter. The particles passing through each filter slot remain entangled. Consider this or an interesting use.... if you can control larger volumes of entangled particles how about REMOTE POWERING OF PROPULSION. Is that what they are using on these huge US made UFOs?

[@Jon6429]

Scuttlebutt on that F117 shootdown at the time was that although the aircraft was hard to spot with conventional radar its 'wake' of displaced raindrops gave it away

[@EHiggins]

I was an electronic warfare technician in the US Navy so i have a pretty good understanding of how radars work and the use of ESM (electronic support measures) and ECM (electronic counter measures) such as jamming, and the use of chaff and flares, but that was in the 90's. I would really like to no more about this subject and how they plan to counter this technology. Of course I'm sure its highly classified. Mind boggling stuff! Even if as some say it may not be actualized as of yet I'm sure there is something is in the works.

[@NeuronalAxon]

How advanced did it seem when you were serving?

[@EHiggins]

@@NeuronalAxonI joined the Navy after USS Stark incedent. Because electronic warfare technicians are responsible for ASMD (Anti-Ship Missle Defense) they put a lot of money into training and equipment updates. It seemed to me that were working with the latest and greatest technology at the time, and we were always getting briefed on what was in the pipeline for the next-gen equipment, but there was never a mention of anything "quantum".

[@Skyflower44]

My 8 year old said to me one day , after spending a Home Ed session of science magazine scrolling . Mummy ! They say that Atoms are in everything . But that's not true.🤔 I replied " Oh ! How so ? He said Because There are no Atoms inside an Atom 😱😊Crazy good stuff for a 8 year old . 😁

[@mrcharming5053]

I'm getting to warm to Prof now he's dropped the angst of the You Tube spooks.

[@ProfSimonHolland]

I love youtube....as long as you don’t want to run a business making films.

[@mrcharming5053]

I wonder if I could have your opinion on something? 🤔

[@vojtasks]

I wonder how you can control how the spin changed how you can know whether it changed since the measurement will change collapse the wave function of the particle that stayed at radar base. How can you know that what you measure is actually a result of a collision of the photon sent away?

[@boss290bafalcon]

Make a quantum jet, easy fix lol..all jokes aside, I really enjoyed your explanation of the whole quantum science magic 👍🏼

[@geobean4092]

Thank you for the brilliant presentation. I learn a lot and hope to watch from you soon.

[@WordoftheFree]

This is so easy..... Quantum particles are trans-dimensional, they exist simultaneously on our plane and the quantum plane. If you entangle them, then essentially the quantum particles create a mirror version of themselves "entangled" in the quantum plane. So separating them on our own plane will not undo they entangled copy that was created during the initial entanglement in the quantum plane. That is why they can still effect each other regardless of distance or time, they are not breaking the speed of light "they are bypassing it altogether"...

[@Dinkum_Aussie]

What a great and interesting video! Seems to me that no matter what the military science fields come up with there is always a solution, so the cat just continues to chase it’s tail, but the technologies invented for evil and destruction can also be used for good, and advancements of man kind!

[@ProfSimonHolland]

thank you

[@raosahab1693]

Prof Simon , I'm watching your video from Pakistan and thanks to you for such an informative video , such a good work you're doing!

[@dr.ofdubiouswisdom4189]

* Quantum holographic projections * We now have 1800 f35's & 1200 Spirit bombers closing in on your position...or not. Care to negotiate ??

[@billionear]

One second please US commander...Yes thank you please tell us the terms of your surrender?...We have launched Khinzals you have not received reports yet but Florida is no longer on the map. Washington, New York and Los Angeles are about to follow.

[@LegitimaMax]

You just explained how Stargates work. What if you change the polarity of the atoms at higher frequency. 🤙

[@davidmyersretiredaerospace8038]

I worked on the vertical take off version at Lockheed. No need for quantum radar.But like all things it in the experiment stage now.

[@cancelanime1507]

Awesome

[@fabio6170]

Then why build a plane like this? If its unusuable?

[@davidmyersretiredaerospace8038]

Could be but i never worked on Radar technology.I really can not see why you would need it.For a start only America have stealth Aircraft, and China do not have or Russia.0 concrete proof they have stealth yet.Russia could have had stealth aircraft long before Lockheed Martin had it.But lack of investment crippled Russia in the program stage.It was invented by a Russian Phd student in Moscow.But strange unusual ways by the American C I A, got all data from this student.I forgot his name now.Lockheed Martin just modified it better.Quantum Radar would need , a massive computer terminal bank for updates and data collecting on a target.In other terms a Quantum computer.

[@scottp3366]

@@davidmyersretiredaerospace8038 China claims to have that computer now. I would say its believable now since traitor google went there to help build their social credit score system. Watching a billion people everyday.

[@davidmyersretiredaerospace8038]

They might have but no real concrete proof at all.

[@Israelischer_Bobfahrer]

very informative, thanks Prof. Simon

[@Flankymanga]

Actually to be precise the speed of light is not constant. It changes depending on the medium it travels through. But it usually is very close to the speed of light in Vacuum.

[@theFLCLguy]

A better way to describe entanglement is two pendulums that sync when they interact with each other. Then no matter the distance you can tell what the others state is by observing one of them. There's no need for a weird superposition or communication at a distance. Everyone misunderstands the uncertainty principle. It's not that it doesn't have a defined state, it's that you can't measure it without interacting with it changing it's state. We have been able to nearly measure both location and speed of a quantum object by measuring it's surrounding. Another issue is treating time as a dimension when it's the interaction of gravity and space. Gravity compresses space which reduces the time it takes for something to interact. Time doesn't flow, it's the changing shape of existence. It appears to flow due to dark energy which is the tidal effects of the virtual particles in an Bose-Einstein condensate state. Acting nearly like a single thing with particles being created temporarily from gravitational waves.

[@theFLCLguy]

And the reason entanglement happens "instantly" is once the things get close enough for quantum mechanics to take over space-time doesn't exist and both things interact in every way possible before the most stable state for both if achieved. Eventually they will be torn apart once something else interacts with them.

[@SSpees]

That Balkin issue may have used reflections from standard TV broadcasting by measuring loss of reception (no TV received) along several measured lines. Not seeing the stealth, rather not receiving the TV signal on a TV. The stealth blocked a signal as it passed through a location. Blocked reception is an indicator of an object rather than a returned reception.

[@henryh3800]

I thought quantum radars could only be made effective over very short distances because of quantum decoherence. They might be able to "see" clearly an F35 from 200m away, but by then it is too late.

[@babakbandpey]

Great job professor 🙏🏼

[@karlthemel2678]

A low-frequency radar station needs a large antenna, so it is hard to hide and perhaps one may find out where these stations are located.

[@guytech7310]

Not any more. Low frequency RF can be generated using very small Piezo antennas hackaday.com/2019/04/16/piezoelectric-antennas-for-very-very-low-frequencies/ Not sure if the radar has to be ultra low frequencies. That said low frequency radars can be easily jammed as Britain and the US did to foil German radar. Planes dispersed strips of foil that basically saturated German radar receivers, preventing the from seeing bomber on route.

[@usaisthebestiockdownpoiice816]

​all radars can be jammed either by electromagnetic beaming, or mechanical chaffs. the 'strips of foil' are chaffs. in reality modern chaffs are aluminium. they cause radar clutter against x band radar(depends). nowadays, modern military radars are mostly pesa types. some aesa, and some pesa hybrids. modern aesa and pesa hybrids are very difficult to jam. they can also do the jamming themselves by beaming hostile radars. they can also be used for communications, networking, iff, and countermeasures. aesa and pesa hybrids can do 'frequency hopping' this makes it difficult to detect and jam them. some fighter radars have very high power output making them good in jamming, difficult to jam, and they can detect objects very far away. at the moment the strongest fighter radar in service is a pesa hybrid which has a whopping 20kw power output across almost a metre diameter transceiver. can detect most fighters at 400km, and stealth aircraft between 40-90km. jamming power and resistance is estimated to be pretty good considering output and size. well, soon a newer radar will come that will take the no.1 spot. probably next year..

[@nokiot9]

....wouldn’t you be able to effect the spin of the atom with your own quantum radar? Using it to disrupt the effects of the enemy quantum radar? Or would you have to know the exact wavelength?

[@divine-wind]

Thank you professor

[@ventisca89]

How far the entangled particle can be still entangled? What's the method of communication between the entangled particles? If we couldn't understand the mechanism, how could we make a counter of this? Sir it's crazy and exciting.

[@bartbrown7137]

Just wanted to give credit where do. Thank you soo much for sharing from the mtns in California. It's all about sharing. Wish the world understood. Keep sharing knowledge is power. Knowledge is peace.

[@Darisiabgal7573]

FTL communication is a violation of Bell’s Theorem also called Bell’s inequality. There are some tangential ways of getting around these limitations but these are extremely difficult to execute and more the domain of high end observation. In our universe everything is entangled even photons in the beam of a conventional radar, on the earth entangled things rapidly undergo decoherence and entanglement with something else and so we ignore all of this. Thus to observe entanglement we look at the electrons evolve say in a vacuum or photons in a non interacting gas. Even the photons in a quantum computer undergo fairly rapid decoherence, which is the problem with building larger quantum computers. I think the problem here is when we x Schroedinger’s cat with entanglement. The cat analogy was made as an absurd argument to describe the incompleteness of quantum theory in describing macro events. The behavior is pretty much restricted to a quanta, in this case the decay of one particle. At the quantum scale things can travel FTL and go back in time, except when they are observed. So here is why the video is BS. If a particle is entangled with the machine that generated it we can reverse time and send it backwards, but if two entangled particles are the product of the machine then with respect to the machine decoherence has occurred and measurement of the second only tells what state the first was in at the point of pair entanglement up until it went decoherence, measurement being a type of decoherence. For example there is alot of symmetry in particle physics, if a particle decays to produce two electrons pairs, then the spins are opposite. We cannot know the spin of either until one is measured, the lack of knowledge and the wave particle duality of the electron is an aspect of the contentious measurement problem. Likewise if the first particle undergoes decoherance, the second does not automatically report its state, it also has to be measured. There are those that argue that not only is QM incomplete in this regard it incorrect, simply because the widely used, modified and deified Schroedinger equation derives a probability function and is non-deterministictic, however we know that even on the resolution of quantum scale observations momentum and energy are always conserved and implies that the universe is deterministic in nature. The problem with the Equation is that it cannot account for spacetime, more specifically in its original form spacetime is non-dynamical; however modern interpretation of spacetime is that it evolves in every direction at luminal velocities. Some versions have been made to make the Equation relativistic, but still it lacks the full dynamical nature. Uncertainty is therefore always present at the planck’s scale making the determinism argument unsolvable, nonetheless, Bell’s inequalities and quantum entanglement suggest a deterministic universe exists, meaning the entangled Up spin is always Up from the point it was entangled to the point it was detected (underwent decoherence).

[@Dawson2011H]

When we were developing F-22, the test flight was shown in video for public to see since we were sure no one in the world could catch up. Same goes F-35. Now we don’t tell the world about our Quantum radar, what does that mean ?

[@Pincer88]

The system used in Serbia at the time was probably an Passive Coherent Locator System using ambient emissions in the RF wavelengths (radio, television, cellphones) and its reflections as a means of targetting.

[@albertmax9662]

Pincer88 my information was that the F117 was able located because the Serbs observed a signal attenuation between mobile phone towers which occurred in a pattern. They sent up a Mig-21 to intercept a suspected stealth aircraft and the F117 was hit with cannon fire from the Mig. Panels flew off and the SAM radars could see it and finished the job.

[@tbilisicentralv2]

F117 was tracked by an IR/Optical guidance device of the S-125. In Bosnia, NATO forces got lazy and used same general paths of approach to target area, so one AD battery commander decided to install his battery along one of the paths, and he used Optical sensor guidance system to track, aim, and guide the missile that shot down the F117. most air defense missile systems in the world have the similar tracking capabilities. its hard for any plane to escape optical and thermal detection. no quantum physics are needed.

[@stimproid]

Russia: Stealth planes don’t work! Also Russia: We are developing stealth planes!

[@jeffkardosjr.3825]

But so far their examples have unstealthy round engine exhausts.

[@dogdog2257]

Su57's design philosophy is too different from f35

[@usaisthebestiockdownpoiice816]

their 'stealth' is different. doctrine and tactics are also different.

[@ChucksSEADnDEAD]

@@dogdog2257 but they still use the similar angular profile to deflect radar away from the receiver. If stealth didn't work their version wouldn't work either.

[@obvioustruth]

How do you known they don't work?

[@Kaptin77]

The fact that the stealth aircraft couldnt observe the quantum radar on the ground is a fairly large problem, one of the tactics stealth pilots use is they weave between radar systems when they can, if they cant see the radars, that brings in a whole new problem

[@Millennium7HistoryTech]

The point is that the radar can have a very low power because it digs very deep into the thermal noise. Nobody will know it was there unless it stumbles right above it, probably. It is a problem not just for stealth pilot but for ELINT in general.

[@Kurzula5150]

Go to 6:45 if you don't need the history of quantum theory and quantum entanglement explained.

[@trickysubject8563]

Incredible sir, it seems the quantum realm is a useable and tangible resource. As for the full understanding of this, it clearly remains to be seen. Could it be that the mirroring effect creates an alternate universe in which we all have a reflected self? 🇬🇧👁

[@trickysubject8563]

Jeremy 77 But is it me who’s dreaming, or the other me? The truth is out there. 🇬🇧👁

[@trickysubject8563]

@Dimitrius Didimitrius it’s the same as Nostradamus, I don’t for a minute think that he wrote prophecies, instead he was sat in a room with the cabal taking notes whilst they outlined some of their events for humanity. We now read these as warnings to a reality that is being played out. Everything has been orchestrated and meticulously planned years ago. Just my opinion. 👍🏻🤓

[@samg9888]

China is quite advanced in Quantum technology. Check out their quantum satellite. This is not something terribly new to the Chinese. However, I'm skeptical how much they are deploying this technology into radars. China's quantum satellite already cost a fortune even when neglecting cost of the satellite. I read a more grounded Chinese article and they claim that the Quantum radar does in fact work and can image stealth fighters from quite far away with a very sound explanation. The biggest downside is that they can not use this to guide munitions. So getting a weapons grade lock on stealth fighters is still a huge problem for China. This is why China is still a huge supporter of stealth fighter technology (with around 5 stealth aircraft projects) even though they can detect stealth craft. Now if they can get weapons grade lock from Quantum radars, then I can see it being a game changer but the Chinese don't really seem to think that will come soon because if they did, they'd probably stop their own stealth projects.

[@Albertkallal]

The radar they demonstrated does not actually use entanglement as a cause + effect. In other words, a cause + effect against one particle that is entangled with another HAS NEVER occurred AFTER the entanglement. The result is that such experiments yield zero in terms of any practical value of entanglement. Again, CAUSE + EFFECT has NEVER been shown in ANY experiment in regards to entanglement AFTER the two particle have be synced. So right now, we have nothing better then if sync two watches. I now send you a box from the east coast to the west coast, and you open up the box, you can now view the time it is on the east coast. However, if you stop the watch, then the other watch does not stop!!!! In other words, EVERY entanglement experiment NEVER shows a cause effect in one location as compared to another AFTER the entanglement has occurred. (again, that key word here is “after”). Never ever has ANY experiment showed cause effect AFTER entanglement. So, you sync two particles, or two watches or clocks. You are now at the LIMIT of how useful this effect is. Stopping one particle, or changing that one particle, or simply stopping the watch DOES NOT effect the other watch, or in this case the other particle. So how is this supposed quantum radar working? Well, they are NOT using entanglement to see effects over two particles. All they are doing is sending “entangled” particles at a object, and the receiver is using a filter that ONLY lets though entangled particles back. So the entanglement effect is being used as a filter but NOT AN CAUSE + EFFECT between two particles!!! The claim and name is LIE!!! A correct term is quantum filter radar. The quantum effect in the radar is being used a filter. In other words, the filter ONLY lets through entangled particles, and they thus assume (a big assume) that they can thus increase the sensitivity of the radar receiver. Again: The radar announced DOES NOT use quantum entanglement as a detection method, nor does it use the effect of a action occurring on one particle to be seen and effected at a distance to the other particle. As a result, this is PURE unadulterated hock em, and is stuff for the stupid low IQ people of the internet. Major fail!!! - an example of how stupid people are that claim to have a brain, and talk fancy. The video creator needs to learn how to read - clearly major fail, and amounts to 100% propaganda. Oh well, so much for the sorry state of the education system, and people like in this video that are beyond stupid.

[@DaydreamNative]

The F-117 was shot down in Serbia, not the Falklands. Not sure what you might think a US jet would be doing in the Falklands tbh.

[@davidmyersretiredaerospace8038]

In 1947 in New Mexico the Army had a very powerful radar on a mountain top doing experiments.Some say this brought down the Roswell craft in Roswell in 1947.Somehow the craft crossed the beam, and was brought down by a jamming a malfunction on the craft.Could be true seeing the same event, took place again not far away, from Roswell.In this case another radar was placed high up on a mountain side.Again another similar craft crossed the area,and this also was brought down.You would think a Alien race would understand about radar.But looks like they do not?????.This how the military got hold of U F O technology.Since then the aliens have learned about powerful radar.

[@paolojoosten6353]

Distance is an illusion!

[@Sparky-vj2dq]

@paolo joosten Well, you might be right but it's equally valid to say the time is the illusory or emergent dimension. Once space has appeared as in a Big Bang scenario things need to time to move about that space but when the mass-energy of a universe is initially contained within a Planck-space or a singularity time is not required since everything that is and which will be is all in the same spot.

[@paolojoosten6353]

@@Sparky-vj2dq Yes,this equally valid to say..!

[@OswaldoLafee]

Great stuff Prof! to be honest this is how I finally got a grasp of quantum general concept. One thing is fo sure: some how, one particle knows that the other particle....is out there!

[@lads.7715]

Years ago, it was claimed that networked cell phone towers could also be used to detect stealth aircraft.

[@matthewmorrissey885]

Ah!!! This video has the element of suprising !!!

[@x-creator4460]

The F-117 was probably shot down by a passive radar rather than a quantum radar. A passive radar doe not emit any signal but is more of a receiver detecting the disturbance of the atmosphere by a flying object.

[@Name-ps9fx]

Now we know what Uhura meant when she’d talk about “subspace” radios....

[@buttert5091]

Lol, That makes so much sense now

[@metatron5199]

Except what was described in the video is just flat out wrong, you can not send information faster than the speed of light even with quantumly entangled systems i.e. The no communication theorm...

[@kyoungd]

I do not see how it would work. You cannot know the state of the photon without collapsing the wave function. Since you do not know its state, you cannot control the orientation of the quantum photon that you shoot out. It'll just be random noise. it is the same problem you would have with quantum entangled communication. Did I miss something?

[@JohnnyWednesday]

Fascinating as always, Professor!

[@malcolmwatt4866]

Um, the Canadian Frigates used a long wave radar for over the horizon ship detection. They bounced the signal off the ionosphere. The range was about 450 miles. I don't know if this system is still being used since the CDN Frigate program was completely gutted over the years with updates or rather replacement technology. The original contractor was Canadian Marconi.

[@justanothervagabond5346]

Somewhere in my mind something tells me that this is crucial discovery for colonizing space and great distances.

[@NeuronalAxon]

@Neurolicious - The Voyager probes made it through the belts though, for example.

[@gregj4857]

Wow that was the best explanation of quantum entanglement I've ever heard...

[@theFLCLguy]

It's the same bullshit they all say. They are so stuck on the idea of superposition and quantum voodoo.

[@felipe69420]

Wow this KZbin algorithm is getting good. Definitely +1 subscriber here

[@Desrtfox71]

It's very difficult to make sense out of non-scientific press releases. The information put out has no context, and in many cases is deliberately misleading. What I take away from recent announcements regarding quantum radar - The two countries making hay out of their quantum radar being capable of tracking stealth aircraft are themselves proceeding full-bore on development and production of their own stealth aircraft. What does that tell you? For myself, this means that, of course, one day stealth may become irrelevant, but that day has not yet come, and both countries touting the ability of certain radars to see such aircraft, consider stealth a viable technique enough to dump significant resources into it.

[@secretsanta9293]

Very interesting another physics phenomena that no one understands. It's time and velocity & the 4th dimension. Now I am so smart that I actually don't know anything!

[@Dra741]

I don't like the thrust-to-weight ratio and I'm glad that she's been adapted to add external ordinance,

[@kathrynck]

TWR is "improving". Most published data is based on the P&W F-135 engine as it existed some years ago, at 39k lbs & change, it's now at 44k lbs & change, and is still undergoing further development. Estimates are on a target of 48k to 56k as a final result. It's worth pointing out, that to match the original engines in the F-15C it would need about 47k lbs of thrust, and although smaller, it's in a very similar weight class to the F-15. The TWR numbers are somewhat skewed though. Most comparisons are made at full fuel, or at "half fuel" (with the assumption that some fuel would be used up prior to engagements occurring). That's typically calculated against internal fuel capacity only. Meanwhile in actual practice, many of these planes use external fuel tanks to extend their range. The F-35 though, is designed from the ground up to not use external fuel tanks, so it has a comparatively enormous internal fuel capacity. As a result, the fact that it can carry far more internal fuel (normally considered a good thing) works against it's calculated TWR. If you change the way you compare TWR, to give the F-35 300 miles worth of fuel, vs other fighters with 300 miles worth of fuel, then the F-35's TWR compares much more favorably than current publications reflect. That said, it still could definitely benefit from a greater TWR, thus the ongoing engine development. But it's not in a 'bad' place on TWR (as some suggest), it's just not in a stellar place either. Bear in mind though, that it has "look to shoot" in 360 degrees, so... in practice it only *needs* to be defensively maneuverable, and only for a fairly limited time. Still, more is more. As for adding the ability to carry external ordinance, that's been a planned upgrade path from the start. It's always been conceived of as having the ability to carry much more ordinance on external hardpoints, either in a post-SEAD environment, and/or to utilize externally mounted "stealth ordinance". Considering it's similarities to the F-15's performance envelope (albeit with a tighter wing loading ratio), one could reasonably expect an F-35 to carry a "substantial" external load if it needed to (Barring the B model in VTOL mode, in STOVL it could carry a good amount though, and it has a payload advantage over the Harrier, and is a drastically better platform once airborn).

[@DummyFace123]

Also this isn’t even how quantum radar works. The photons that get reflected back are detected by measuring the spins of incoming photons with the entangled partners that didn’t get projected... I appreciate your videos, but sooo many people already misunderstand quantum entanglement and this is just going to keep that misunderstanding going. If you mess with the spin of an entangled particle, it does NOT alter the spin of it’s previous partner. It is simply no longer entangled.

[@ProfSimonHolland]

Great info...and very clear...thanks for adding to the facts..

[@fisophia1734]

Tq info, u is my online teacher, im share your channel to my frend ☺️

[@carolinaribeiro8480]

But China and Russia also are investing in stealth aeroplanes and they're keen on showing them. If we assume that NATO countries also have their own Quantum Radars, then there is some loophole in this technology that can be used by stealth fighters.

[@Brassmonger]

Now everyone needs quantum stealth bomber.

[@DragNetJoe]

What you imply at 5:40 breaks faster than light communication, which it doesn't. Information does not travel faster than light. Just like your two gloves, if you look at your glove and it's left, you know the other is right, but no information traveled faster than light.

[@whome7004]

Teach That's a Good One from Head to Toe, I only wish I were smart enough to Help U Lurn because the on going exchange of ideas, info,then broken down in a way People Just like myself/low Wattage Bulb,are able to feel like we are radiating like the Sun Beams AKA Professor/Teach Simon

[@aarashnavabi4749]

So here is my theory. What happens if we use this quantum radar and aim one entangled photon into a black hole. With the other entangled photon we can figure out what happened to it’s entangled partner when it went into the black hole. We can send a series of ones and zeros in the form of entangled photons ones that we have a copy of back at home and the other that is going into the black hole and get an idea of what happens to things when they’re entangled buddies cross the event horizon.

[@TheOriginalDeckBoy]

before i watch... guessing.. radar creates two quantum entangled electrons, shoots one out storing partner in phased radar rod. As the beamed E- hits a plane the state changes and therefore the E- back at the radar changes state... paints an outline of plane, then ID's?

[@shaimach]

With an EPR pair, the fact that Bob measured (or otherwise manipulated) his spin is undetectable by Alice. If it where, this would allow faster-than-light communication. Therefore your statement at 7:15 - 7:25 is, at best, misleading. You MUST "close the circle" - either by having classical information transmitted between Alice and Bob, or in the case of quantum radar, have the entangled photon reflected back to the source, where it can interfere with the idler photon, to detect anything.

[@335alien335]

Doesn't "really long wavelengths" imply really big antennas?

[@psuedozardozz]

An image of the Russian Nebo radar. images.app.goo.gl/YMSLRPFYGq1nAq5e6

[@Desrtfox71]

It also means very low resolution.

[@Desrtfox71]

@@ingerechtannon2471 And yet, China, Russia and even Germany (plus other nations) are pouring billions of dollars into their own stealth programs. Apparently, media news aside, the military procurement arms of the world still think stealth is the way to go. That should tell you something about the viability of the "new" tracking methods.

[@ukasz943]

Thank you prof Holland. This is amazing stuff. I appreciate your work and can't stop admireing you. I have beed watching your videos for a few month now. I startded with boeing 373 max series. Please keep going. Special thanks for excellent music and graphics. I can see steady improvement. Regards !

[@ukasz943]

737 of course, my bad

[@ProfSimonHolland]

Many thanks...Simon

[@robsmith400]

We think that something is connecting them because they always end up opposite right?. Suppose they are, at the time of entanglement, set into a predetermined spin only it's more than spin it may be another property that resides in a dimension we cannot " see".

[@charlescoots2426]

Consciousness connects the particles

[@kathrynck]

Good video, but somewhat misleading on the conclusion. Quantum radar has a pretty limited range. Beijing's claim is that theirs can see up to 62 miles at most. It is also very technically hard to manufacture such a radar. It will be a long time before this is even remotely common as a ground radar. Far longer before there are aircraft using it, & prohibitively costly for missiles (note: QR can't organically share targeting info with a missile in a manner invulnerable to jamming). IRST can see the front of a jet almost that far, and the rear of a jet somewhat farther away. IRST is comparatively inexpensive. Ergo, quantum radar may never be fielded operationally. The F-35's RCS characteristics are well matched to its inherent IRST vulnerability. A realistic future conflict would see aircraft using IRST to look for F-35's at perhaps 3 times visual range, while it can itself detect non-stealth aircraft at 200-300 miles, or somewhat less far in 360 degrees. And then there's terrain following. With a high wing loading, the F-35 would have exceptional treetop flight characteristics (minimal risk from wind shear). At about 20-30m altitude, even on perfectly flat ground, the curvature of the earth would hide it until it was very close to a ground radar. Airborn QR would not detect it very well against ground clutter. And the thicker, wetter atmosphere at ground level would also limit IRST detection range. The F-35 isn't invisible, it just makes it nearly impossible to have no gaps in an air defense grid, and it sees airborn targets well before they see it, with obvious results that speak for themselves in Red Flag/Top Gun. Against current air & ground targets, it's an absolute Monster. Against future tech, it's designed to remain highly effective. QR & IRST does call into question the "publicly stated" flight envelope of the B-21 Raider though. But even if it's stealth is somewhat limited, the USAF needs SOME sort of flying bomb container just so they can retire antique bombers held together with duct tape.

[@stupidburp]

The utility of stealth is real and will continue but it involves trade offs that will keep other platforms useful as well. An F-35 is difficult to detect but an F-15X can carry much more firepower, operate with less expense and down time, and lasts much longer before it is worn out. A B-21 will likewise be good for penetration but will almost certainly have limits in weapons load, speed, flexibility, and cost and probably will not be exportable. A replacement for the B-1B with similar characteristics of high speed, operation at very high and low altitudes, large weapon load, but only limited affordable and exportable low maintenance stealth would make a good complement to the B-21 if political will could be found to support it. The only reason that the USAF has downplayed the B-1B despite its many advantages is because it can't carry nukes by treaty. A similar replacement would not be bound by the same treaty, although the treaty is due to end soon regardless. This is also why the USAF talks up the B-52 - because it can still carry nukes even though it is an inferior platform to deliver them compared to B-1B and B-2. There are too few B-2 to rely solely on them for nuke delivery so that leaves the B-52s that light up like a Christmas tree on radar without EW to attempt to hide them.

[@alvaropenen2118]

I have seen some videos with a lot of information about quantum radars, i feel i spend my time watching this.

[@time2drift]

@Professor Simon Holland You don't need quantum radar in order to track a stealth plane. The russians have been tracking the F-35 with passive radar. Up to this point no quantum radar has officially entered service.

[@mschwaller3371]

I think you are implying you could change the spin on one entangled particle and the other one would keep switching accordingly even on great distances? Thats not actually true is it?