Single-photon detectors - Krister Shalm

No video

Single-photon detectors - Krister Shalm

Рет қаралды 46,984

Institute for Quantum Computing

Күн бұрын

Пікірлер: 55

@mohammadsadeghashrafpoor6737 10 ай бұрын

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 2 жыл бұрын

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

@ArpitAgarwal1 9 жыл бұрын

very insightful in the field of SPS and detector

@drvignesh 8 жыл бұрын

Thought provoking and interesting info regarding single photons!

@aroopkantibose1373 3 жыл бұрын

very nice talk

@drarp 6 жыл бұрын

The real content starts at 9:01

@janalbrecht5099 3 жыл бұрын

love people like you thank you

@phyozeng223 3 жыл бұрын

Great talk!

@rastislavblablabla3615 5 жыл бұрын

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.

@BrendaEM 5 жыл бұрын

Thank you for posting this : )

@abdulrahmanalbarqi5992 6 ай бұрын

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

@user-hk6pu8nt1s 2 ай бұрын

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

@engx3733 4 жыл бұрын

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

@alexandriahephaestrin634 2 жыл бұрын

The link is not working

@jamesstewart7212 3 жыл бұрын

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

@schmetterling4477 2 жыл бұрын

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

@jamesstewart7212 2 жыл бұрын

@@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 2 жыл бұрын

@@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 2 жыл бұрын

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

@rl7012 2 жыл бұрын

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

@sudeephalder5077 2 жыл бұрын

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 Жыл бұрын

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 2 жыл бұрын

Approved for 30k.

@kratos5186 5 жыл бұрын

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

@MrSupervin94 4 жыл бұрын

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

@rl7012 2 жыл бұрын

Some of this talk is bs for sure.

@WalterSamuels 10 ай бұрын

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 10 ай бұрын

It's a cult bro

@bobm4378 6 ай бұрын

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..

@user-ys4cy6jw1v 3 жыл бұрын

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

@schmetterling4477 2 жыл бұрын

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

@veronicanoordzee6440 7 ай бұрын

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 6 ай бұрын

@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 6 ай бұрын

@@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 3 жыл бұрын

unhelpful

@schmetterling4477 3 жыл бұрын

What was unhelpful about it?

@rl7012 2 жыл бұрын

I agree. Total word salad no proper scientific substance.

@jacobvandijk6525 2 жыл бұрын

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

@rl7012 2 жыл бұрын

@@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 2 жыл бұрын

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

@ddstar 4 жыл бұрын

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 3 жыл бұрын

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

@rl7012 2 жыл бұрын

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

@rl7012 2 жыл бұрын

That is not the only place he is wrong.

@schmetterling4477 2 жыл бұрын

@@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. :-)