Alain Aspect - Single Photon's Interference

Описание

2022 Nobelaureate Alain Aspect's Talk on
Wave-Particle Duality

The experimental evidence of the wave-particle duality of a single photon.
It was to give a decisive empirical answer to "one of the great mysteries" in Quantum Physics:

Is the wave nature of a microscopic particle (e.g., photon, electron) only a macroscopic appearance created by the ensembles of such particles; or does it manifest even for individuals of such particles?

Talk was given at McGill University, Montreal
As part of its Anna McPherson Lecture Series
19 November 2015

(Personal recording. Low video quality. Glad to share :).)


0:00 Clip's start
4:00 Introduction of Topic
7:32 Introduction of Speaker
12:48 Antiquity: Light as particles
17:28 18th c.: Light as waves
21:52 1905: Light as particles, revived
25:05 Theoretical formulation of wave-particle duality
29:06 Practical successes of wave-particle duality
33:47 Wave of a single particle, in theory
38:48 Theoretical proof of single photon emission
41:24 Emperical assurance of single photon emission
49:50 How to produce a single photon
54:34 Can a single photon interfere with itself?
1:06:49 Assurance of a single-photon-interference: Delayed-choice experiment
1:12:30 Significance of duality
1:15:47 Application in crytography
1:20:45 Conclusions
1:23:44 Questions & Answers