Single-photon detectors - Krister Shalm

[@mohammadsadeghashrafpoor6737]

It was the greatest lecture that i've seen about this topic I really needed to understand how it works by real fibers instead of just seeing some slides ❤

[@mfglinux]

Very nice talk and nice recording. One can watch it like if we were there. Congrats to the speaker for his educational spirit

[@abdulrahmanalbarqi5992]

Nice lecture. i was wondering how can you distinguish between initial detection and after pulse detection? thank you 01:14:00

[@drvignesh]

Thought provoking and interesting info regarding single photons!

[@ArpitAgarwal1]

very insightful in the field of SPS and detector

[@drarp]

The real content starts at 9:01

[@janalbrecht5099]

love people like you thank you

[@phyozeng223]

Great talk!

[@aroopkantibose1373]

very nice talk

[@BrendaEM]

Thank you for posting this : )

[@rastislavblablabla3615]

Excellent lecture. Do you have it in written form? I come from Slovakia and some things I do not understand well and I would like to read it all.

[@engx3733]

We are dealing with pulse issue with our quantum device running at quanta - Is there any detector that can solve this issue?

[@alexandriahephaestrin634]

The link is not working

[@GdncHfjbdkf]

This light detectors how much photons can you see?, no more than three

[@jamesstewart7212]

Any thought on the size of a photon? Could they be large or very large but the detection efficiency low?

[@schmetterling4477]

Photons are energy. Energy doesn't have a size.

[@jamesstewart7212]

@@schmetterling4477 Photons have momentum, can be discreet (photoelectric effect) or wavelike (interference). The wavelength can be miles long (radio) or discreet (gamma). But no size?

[@schmetterling4477]

@@jamesstewart7212 Photons are irreversible energy transfers between an electromagnetic field and an external system. A photon never shows interference effects. Only the quantum mechanical ensemble of an em field does. Most people, many physicists included, are having a hard time distinguishing between one photon and many (the ensemble).

[@jamesstewart7212]

@@schmetterling4477 Thank you for your thoughtful response. Your photon is a verb. I'll be thinking about that one.

[@rl7012]

@@schmetterling4477 So how do they know when they get a single photon then?

[@sudeephalder5077]

Please provides the answers. How single photon can be produced from a continuous laser source ??? Explain in details pl Can we use pulse laser as an replacenent of single photon source , if not how these two differ???

[@schmetterling4477]

A photon is simply an irreversible energy transfer between an electromagnetic field and an external system. It doesn't take a laser or a pulsed source to detect a photon and a single detection will tell us absolutely nothing about the source.

[@jasonbourne7179]

Approved for 30k.

[@WalterSamuels]

The delusion of the "single photon". There is no such thing. The size of a "single photon" is always relative to the emitting particle's energy, and the energy received by that particle.

[@INDIOBRAVOO]

It's a cult bro

[@bobm4378]

problem is, most of this is defined by MATH.. If you are in college, and want to pass, you do what the *ancient* books say... 'reality' has nothing to do with it.. and do note 'energy' has only a level, and 'size' has a level AND length..

[@kratos5186]

I'm confused.Aura is light.,but we can't see that light with naked eye?

[@MrSupervin94]

It’s ok lord Dracula, always stay away from light if you don’t want to die

[@rl7012]

Some of this talk is bs for sure.

[@عبدالعزيزيونس-ذ9ظ]

In theoretical physics, what if photon is actually two photons sharing the same room.

[@schmetterling4477]

Then the wave function is fully symmetric. Bosons like to do it that way. ;-)

[@ddstar]

46:34 totally and absolutely wrong. Read Steinmetz, Faraday and Maxwell and then Tesla. None of this is true. That's the part when relativity breaks down and quantum becomes a dumb thing. There is a spacial void between the two plates and only blue light can traverse through the because of its wave length properties. Lower frequency light bends more when it comes in contact with the magnet field, so you never see a connection of the circuit.

[@schmetterling4477]

A chocolate Santa/cookie package is on the way to you.

[@rl7012]

@@schmetterling4477 Your the one that needs the care package.

[@rl7012]

That is not the only place he is wrong.

[@schmetterling4477]

@@rl7012 Why are you so angry at people who know more than you? Did you have a bad time in high school science class? Does the humiliation sit that deep? Dudes, you need help to overcome your knowledge-phobias. :-)

[@veronicanoordzee6440]

MODERN PHYSICS IS BECOMING A RELIGION: A LOT OF PREACHTERMEN SPEAK ABOUT ALL KINDS OF PHENOMENA, BUT THEY MAKE NO EFFORT AT ALL TO PROVE THEIR CLAIMS. ARE YOU A BELIEVER TOO?

[@bobm4378]

@veronicanoordzee6440: you do not have to shout!! (caps)- the only 'religion' is working hard in college to get your good grades, and get a job... :/

[@veronicanoordzee6440]

@@bobm4378 YEP, IN LIFE YOU GET FEW THINGS FOR FREE. GOOD LUCK! P.S. WHEN YOUR PERSONAL PHOTON-RECEPTORS DON'T WORK THAT WELL, "SHOUTING" BECOMES INEVITABLE ;-)

[@qualquan]

unhelpful

[@schmetterling4477]

What was unhelpful about it?

[@rl7012]

I agree. Total word salad no proper scientific substance.

[@jacobvandijk6525]

@@rl7012 I advice you to read a book on Quantum Optics.

[@rl7012]

@@jacobvandijk6525 Why? It won't explain how they isolate a single photon and shoot it will it? I advice you to learn to think for yourself sunshine.

[@jacobvandijk6525]

@@rl7012 Why? I thought you were searching for "proper scientific substance". If not, dream on.