What Is Quantum Entanglement? A Harvard Physicist Explains

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Күн бұрын

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@michamichalski7907 Жыл бұрын

My understanding is limitted here, but maybe someone will be able to explain. Let's say we have 2 entangled particles and we separate them. How do scientist know their properties have been entangled? Is there any way that we can conclude someone broke entanglement from the perspective of another particle being far away? If we can tell exact time when entanglement was broken being far away, that means the information can be sent faster than light, which I think is wrong. But then it bothers me how do scientis know that this works if they can't observe it?

@OilyLagrunge Жыл бұрын

I'll try! 1. There are various methods to guarantee an initially entangled state in your setup, one common method is by creating photon "pairs" through a process called Spontaneous Parametric Down-Conversion, where two photons are instantaneous produced in a material and are necessarily entangled by the process that made them. You can even _measure_ a system into entanglement by what's called a Bell measurement. 2. From the perspective of only _one_ particles, no. It requires both parties to communicate results to ensure that correlation was maintained. 3. We cannot pinpoint a time at which entanglement was broken so no worries there. So far, there has been no theoretical or experimental results from quantum mechanics which violate the speed of light (or more precisely the speed of information), and we don't expect it ever will. 4. Rather than directly observing one single particle pair as "being entangled", we can break entanglement of repeated paired particles in rapid succession in the lab, and we see that the collective results are highly correlated (too correlated to be an accident). It's also important to note that if this didn't work, some special behaviors predicted by theory alone would not arise in our experiments. For instance, certain computations on quantum circuits would not work as we expect. However, they most definitely do work!

@kevinjasak8420 10 ай бұрын

@@OilyLagrunge haha magic man and funny words

@OilyLagrunge 10 ай бұрын

@@kevinjasak8420 🧙‍♂️⚛️

@johnlawrence2757 9 ай бұрын

@@OilyLagrungewell: true quantum entanglement has never been achieved in the laboratory so your observations aren’t valid at quantum level. What matters is the natural occurrence of entanglement which is happening all the time and what impact this is having on activity at the gross level. This might be far more damaging than we have so far imagined, with impact on weather systems for example and personal relationships. “Scientists” need to abandon the notion that entanglement occurs in isolation and understand that it is actually integrated into the process of creation itself and that the latter could not proceed unless entanglement were a characteristic of quantum mechanics

@hellifiknow1315 8 ай бұрын

Because scientists demand absolute proof from everyone but themselves

@Firstrowinheaven 11 ай бұрын

We are technology before we have discovered it

@alphalax7747 3 ай бұрын

Because we live in the matrix

@markoprskalo6127 25 күн бұрын

Humans can be Quantum entagled

@ChainShrine 7 күн бұрын

DNA itself does act and look like some kind of technology

@X_gg505 3 ай бұрын

I didn’t understand a word he said but it sounds smart. Love it !

@kobe51 8 күн бұрын

Awesome!

@ayushkumar6970 Жыл бұрын

The most useful application to humanity could be the ability to keep up instant communication with space explorers like voyager 1 and 2 indefinitely. So, even when they are way out of our solar system and visiting another solar systems, galaxies in many more thousand years to come we would be able to see the images coming out of it and probably if some alien species tries to Hijack it or communicate lol

@bobmusil1458 Жыл бұрын

That would be nice, but it doesn’t work!

@ProNice Жыл бұрын

That would be nice!

@michaelchoi5247 Жыл бұрын

sure but how would that effect general relativity? when the distance of the object that is further away you are looking further in time?

@the-partial-anti-furry 11 ай бұрын

You do know that as soon as a particle is observed it stops working right

@ayushkumar6970 11 ай бұрын

@@the-partial-anti-furry yes I do. I was saying what cool of a thing it'd be if it just worked... Imagine Bering able to see into other galaxies and maybe an alien civilization descending you to the planet lol. Unfortunately it doesn't work. Maybe we'll have to wait a thousand more years to see something like it

@starsreflectingsky 11 күн бұрын

I hope this is something that isn't beyond our ability to understand. I have to accept that there might be some things that we may never actually have a mechanism to comprehend. I hate that. Of course the search will always continue. But it's just awesome that a thing that's happening and we can't explain why it happens. Regarding this topic we are kind of like Newton knowing that gravity is a thing but not knowing why it works the way it does. And even though we have explanations for gravity we don't know what space is. Not really. It's just awesome that we have so much we can still discover potentially yet we can operate within these systems to do physical things without knowing why it works the way it does. It's humbling to at least have that degree of awareness about our lack of understanding or potential to not understand

@Soumyajit_Nag 9 ай бұрын

Then, those time strings and those morse code shown in the movie Interstellar somewhat demonstrated the Quantum Entanglement Theory?

@olegmakarikhin Жыл бұрын

How to we can manipulate with quantum object wirhout of destroying its state?

@matangihealingbyjaya886 Жыл бұрын

The application he is talking about is the detection of potential spying on your data. when Someone spies on your data the state of the observed particle changes that cause entangled particle also to change it's state

@user-mc4ny1rn7o 8 ай бұрын

The reason that you can't destroy because of wave meet at the same frequency I don't thinks that will destroy the wave function and instant you already have the information through yours conscience so nothing can destroy that information is already a fact and can be proven no doubt about it

@ProNice Жыл бұрын

Also, you can create communications between entities that are many many lightyears away, enabling the possibility of galactic civilization. So big deal?

@brotherpain2912 Жыл бұрын

sound wave cant move faster then light how are we to communicate

@ProNice Жыл бұрын

@@brotherpain2912 Sound waves don't travel through the telephone line. And Sound waves don't travel through cyberspace. Yet we can hear people from all around the world, with minimal delay. How is that possible? Because Information can travel faster than the speed of sound. And in the case of quantum entanglement, even faster than the speed of light.

@edwardsl8016 Жыл бұрын

@@ProNice Nothing can travel faster than speed of light, period. Light travels at 186,000 miles per second (300,000 kilometers per second). As an object approaches the speed of light, its mass rises steeply, becoming infinite, and so does the energy required to make it move. Since such a case remains impossible, no known object can travel as fast or faster than the speed of light.

@ProNice Жыл бұрын

@@edwardsl8016 I'm aware that most interpretations of quantum mechanics, like the Copenhagen interpretation and the many-worlds interpretation, assert that there is no-superluminal information transfer, even between entangled particles. There are still the current limitations concerning that measurement collapses the wave function, the no-cloning theorem, and other hurdles. But looking at the progress we are making, it would be the most likely way to establish superluminal communication. Which would enable a galactic civilization. I'm familiar with the relationship between mass and energy, but thank you for explaining nonetheless.

@oralon99 Жыл бұрын

@@ProNice not sure what you ment by that..., but still as you said information cannot travel faster then light so quantum antanglement can not pass any information

@aceayo1991 10 ай бұрын

Does this extend the range of communications between devices at outterspace and home

@pdxdragon7479 3 ай бұрын

Here's a dumb question, because I'm a dumb person: I take two shoes entangled by one being manufactured to be a right shoe and the other manufactured to be a left shoe. I put one shoe in one shoe box and the other in a different, identical shoe box. I don't know which shoe is in which shoe box. Are the states of the two shoe boxes in superposition? I send one shoe box to orbit Saturn. If I open the shoe box on Earth I instantly know the state of the shoe in orbit around Saturn. That doesn't seem very spooky to me, but I'm dumb. Am I missing something?

@goodwinscience7131 2 ай бұрын

You're not dumb. That's a great easy to understand example and catches the essence of entanglement, better than some professors I've heard which implies you are the opposite of dumb.

@pdxdragon7479 2 ай бұрын

@@goodwinscience7131 Thank you. What's spooky, profound or even slightly interesting about an experiment like that? I'm missing something. I'd expect Albert Einstein and his friends to say something like, "Of course you can instantly know what the state of the distant box is." I'm your channel's second subscriber. If you can explain the importance of entanglement to a person like me, perhaps you can make a video abut it.

@goodwinscience7131 2 ай бұрын

@@pdxdragon7479 IMO the best science is simple and easy to understand once discovered, however it Does have profound implications. You give a simple relatable example of how information can travel faster than the speed of light and Einstein claimed that couldn't be done. If information can travel faster than light we can send communication faster than light and if you can send information you can do a lot of other things as well the rest is engineering. I'd be happy to go into more examples or collaborate on more:)

@hungrylearner9110 7 ай бұрын

i have some question, please answer if you know, my question is that, how did scientists conducted that entanglement experiment? And how they observed the particles light years far away, and main thing how do they know they are entangled and also don't have any difference in time to transfer information?

@jjj-xd9nw 16 күн бұрын

They used thought Experiments

@dominiqueruffin2972 8 ай бұрын

I would think this is useful when padding into while traveling at light speeds.

@flyingcucumber 10 ай бұрын

You can't really manipulate it. All you can do is to observe. The result will be random everytime you observe it. It's wishful thinking to commercial something that is the very definition of out of control.

@kalebbeley4687 Ай бұрын

Name of song

@KavinBavisi 10 ай бұрын

It mean something is even faster than light

@omaralami1 9 ай бұрын

Nah that’s not how it works realistically

@notaleagueplayer220 Ай бұрын

The information transmission is indeed faster than light, but it doesn't contradict the restricted relativity theory of Einstein because it's an information not an object on itself. Nothing is faster than light because by definition you need an infinite amount of energy for that

@markoprskalo6127 25 күн бұрын

@@notaleagueplayer220true Also human quantum entaglement works that way

@phillipmoore6295 10 ай бұрын

He said it right the first time. Then put his foot in his mouth. Entanglement is "correlation" NOT "causeation. The entangled particles together make a single system with the net spin of zero. But, one particle does NOT communicate with the other. They just have opposite spins. Just because the "math" says something. Doesn't mean that holds up in reality. Math says you can go back in time. But, in reality, you can't. The speed of light is the speed of causality. If intangled particles could "communicate" faster than the speed of light. Then they could go backwards in time. Nothing can go bacward in time, and the only thing that can move faster than the speed of light is space.

@user-mp4iw8bz9l 9 ай бұрын

You said it right the first time, then put your foot in your mouth. There's no real evidence that going ftl takes you back in time because it requires infinite energy to go at ftl

@phillipmoore6295 9 ай бұрын

@user-mp4iw8bz9l Sorry, no "foot in mouth" . That is a "real" theory backed up by math. Light particles travel "at" the speed of light in a vacuum. So, are timeless. (Zero time passes for a photon.) Theoretical particals called "tachyons" travel faster than light. The "math" says that they exsit, but we do not have the mechanical know how to detect them yet. Remember, the Higgs Boson was also a mathmatical concept particle "before" the Large Hadron Collider. Now, it is a proven fact. The math always "leads" the dance it physics. That's why we have "theoretical physicist " and "practical physicist ". The "practical physicist" create the mechanisms to observe and prove the mathmatical calculations of the "theoretical physicist". It's Theoretical Physicist that claim that going faster than light would break causality. Allowing you to go back in time. Not me. Pay attention.

@ryanisber2353 9 ай бұрын

Space doesn’t “move” faster than light. Objects can never travel faster than the speed of light THROUGH space. Space is expanding at a RATE so the distance between two objects increases as time goes on. The expanse of space between two points can be described as (speed of increase/ distance between points). Reason: space expands faster between two more distant points so we divide by distance to get the fundamental expanse irrespective of distance. If you check the units you get m/s/m = 1/s Thats right space expands at a rate. I wasn’t trying to be rude with the caps I just wanted to emphasize the important points. This means that two objects can get farther away at a rate faster than the speed of light and can appear to be traveling away from each other faster than the speed of light but this is because neither are moving through space faster than light, the space itself is expanding. This is one of the reasons why Einstein defines special and general relativity as operating in a local environment where space expanse can be ignored. Aka we are only looking at objects traveling through space

@phillipmoore6295 9 ай бұрын

@ryanisber2353 Space is "expanding". So by what mechanism do we have "expansion" without movement? Space IS moving. It's impossible for two points to change the distance between them, without movement. BTW, that movement is between galaxies, currently. But, the "Big Rip" theory, which most cosmologist adhere to, including NDGT. Says that eventually, that space expansion will not only happen between the galaxies. But, will grow to include solar systems, and eventually, atome themselves. Nothing can move through space faster than the speed of light (as far as we know). But space can and does actually move. (without limits). Also, if "dark energy" is the cause of space expansion. It's likely that dark energy can move faster than the speed of light as well.

@johnlawrence2757 9 ай бұрын

The two particles are in instantaneous contact wherever in the universe they are: that’s why quantum mechanics is said to be outside the standard model: the speed of light is irrelevant at quantum level, since information does not “travel” between them, it exists simultaneously within both. So this raises the issue of pure consciousness and the perception that quanta are an expression of the awareness of this ultimate level. And this is why “scientists” are so reluctant to accept reality of quantum mechanics. Unlike Einstein

@mk810 3 ай бұрын

Yeah space n stuff bro

@jeramieshoe837 2 ай бұрын

You mean the chiral network?

@cadillacjack2652 11 күн бұрын

I think the best application would be communication devices. Embed a pair of entangled particles onto a pair of diaphragms. As you speak across one, the other should resonate at the same frequency. Instant, lossless, unhackable communications over any distance

@user-mc4ny1rn7o 9 ай бұрын

What is puzzle me is how that correlation work firts I know entanglement works it is fact there no distance or time that can affected I thinks that entanglement works through out the frequency of the wave function that interact between each other I would say one particule will send wave through certain frequency and the other particule in the sun or other part in the universe it will change the state of the other particule instant no time or space between them and the other get the information right in there. So I thinks is in the quantum level of energy that the interaction is occurring. Which I do understand why Albert eitjn called spoky Action to me it's puzzling trying to understand how it work but it does

@johnlawrence2757 9 ай бұрын

Consciousness is outside standard model of physics. This is where quantum mechanics operates. Psychic communication is instantaneous for this reason. If you are stuck in standard model perception of physics then you have no chance of understanding how the universe works or even what a living breathing being actually is. That’s what Vedic science means when it says beings are created in God’s image. Wake up chaps :- it’s time to take a back seat and do some listening instead of talking

@FisicaDirectoaoAssunto 9 ай бұрын

Revolutionary stuff...THIS, and most probably not Crypto is worth learning!

@gytispranskunas4984 5 ай бұрын

Soooo... Basically the Internet without latency over the distance of the cosmos?? This would be insane. Imagine being on Mars and having real time conversations with earth... Faster than light.

@pdxdragon7479 3 ай бұрын

I don't understand entanglement, but one thing that's been conveyed to me is that this is NOT a method to communicate between two points in space. I don't believe the term he uses, "manipulate" means setting the state of one particle that effects the other. I've asked a question in this video that should demonstrate my ignorance.

@FixingPhysics Жыл бұрын

It's not magic. It's basically a shared secret number.

@Cookiee941 10 ай бұрын

@DadeMurphie 7 ай бұрын

@@Cookiee941 Yes

@D_To_The_J 10 ай бұрын

wouldn't this make online gaming lag free?

@DadeMurphie 7 ай бұрын

No information is communicated via the entanglement.

@D_To_The_J 7 ай бұрын

@@DadeMurphie wouldn't you not need to send information. If a players inputs are entangled in a fighting game, then their character should do exactly the same thing on my screen as their screen at the same time?

@DadeMurphie 7 ай бұрын

@@D_To_The_J input is information.

@suryachoudhary5878 6 ай бұрын

@@DadeMurphie dude it does, quantum satellite, china read abt it

@DadeMurphie 6 ай бұрын

@@suryachoudhary5878 no it doesn't that's why you need to read more about it.

@ResAK369 4 ай бұрын

I write A in one paper. And write B in another paper. Now the 2 papers are entangled. You can send them far away, but when one person open and see B for example, now you know the otrer paper is A. Am I right? Maybe not so spooky?

@weeep4652 3 ай бұрын

Spooky in that it is instantaneous. If someone were at mars it would take minutes on the current internet.

@thelifefulfilledcoach Ай бұрын

Like twins.

@freespeechorgetsilenced 21 күн бұрын

if this is true and the big bang is true. The every electron is already entangled with every electron. Proving one of the theories wrong.

@zetus01 3 ай бұрын

Entanglement doesn’t offer an instant communication. We are still limited to the speed of light.

@oppamaclare Жыл бұрын

So counter-intuitive. It's spooky alright.

@martin6ariza Жыл бұрын

Hahaha, quantum entanglement is telling us something profound about our "reality". Humans : yeah ok how can I benefit, what is the tangible value and not philosophical

@marius4451 28 күн бұрын

Mathematically speaking i could have -3 brains, mathematics allow that and we al know it could never be.

@athosgomesfonseca 17 күн бұрын

Conversely, the elites can use it to exercise further influence. 🤭

@words911 28 күн бұрын

Cell phone communication

@pweetypoo 6 ай бұрын

I wonder if my identical twin and I are entangled.

@chacho28x Ай бұрын

even under the fleece you can see he’s more wide than he is tall

@user-rg8in8jv7r 7 ай бұрын

It can help in Telekinesis

@georgemalizia652 6 ай бұрын

Going that far to see if someone is spying on you. There's nothing you can do about it anyways.

@diesalott Жыл бұрын

Either way; Science?

@Awakeninghumanzombies247 6 ай бұрын

🎉🦁🕊️👑

@lynxoflight72 Жыл бұрын

Am i the only one who read that the entagnlement is annulled once a manipulation takes place? thats the whole thing of why quantum communication doesnt work. You cant just take two entangled particles and yeet them across the galaxy and then manipulate one particle and expect that the other particle will tell you ANY information at all. because by observing, you are already breaking the entanglement and youll never know, if the other one even had a manipulation or not.

@ThePopeOfAllDope Жыл бұрын

How does observing break the entanglement?

@alan911wesley Жыл бұрын

Yes, you can only observe that it's coupled like seeing their spin but you can't use it for communication, is what I read too. But this is the second video where I'm seeing that someone is talking about communication though entanglement

@Dremth Жыл бұрын

Yes, you are correct, and the only people that talk about entanglement with regards to communication are people that don't understand entanglement at all. Last I checked, it was pretty widely agreed upon by most quantum physicists that information exchange with entanglement is fundamentally not possible.

@Dremth Жыл бұрын

@@ThePopeOfAllDope It collapses the wave function. When two particles are entangled, it means they're guaranteed to have opposite spins, but until something measures the spin of the particle, it's considered to be in both states at the same time (superposition). Once you measure one of them, it has to pick one of the two possible spins to show on the measurement, so they then both snap into opposite spins of each other at the moment that measurement is made. Once a spin has been measured, they can't be put back into the superposition state, so any further manipulation to one particle now has no effect on the other, meaning they are no longer entangled. The reason is because the whole way a particle becomes entangled is because you perform an interaction to some original particle that is guaranteed to release two opposite results. In other words, you can't just choose to entangle particles. They just *are* entangled as the result of whatever interaction emitted them. Entanglement is almost better thought of as a line of logical reasoning than thinking of it as a physical phenomenon, even though it is technically physical.

@ThePopeOfAllDope Жыл бұрын

@@Dremth Solid. Man I gotta open up Griffiths again.

@iamzuckerburger 3 ай бұрын

Who is this gorgeous man my gawd. Smart AND handsome

@feft_and_kwkkcng9406 Ай бұрын

Quantum Entanglement is incorrect. However, you say Bell's Inequality theorem proves it from text book. Non locality, you say the end of the Universe can reach the other end of Universe in one nzno second. Brah. There are real physicts do not agree entanglement. Remember it.

@feft_and_kwkkcng9406 Ай бұрын

* Nano second