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10 videos · 6 h 39 min
Course · CERN
CERN Lectures · Elías F. Combarro · 2020
A hands-on CERN lecture series: the circuit model, BB84 key distribution and the CHSH game, teleportation and superdense coding, Grover's and Shor's algorithms, annealing, variational methods and error correction, with exercises run on real cloud quantum computers.
Explainer · IBM Quantum
Qiskit
IBM's Qiskit team builds Bell's inequality from scratch for newcomers, in the wake of the 2022 Nobel Prize. Watch for the moment an argument about 'reality' turns into an inequality that an experiment can check; today you will meet it as a single number, S.
Demo · CIQM
Center for Integrated Quantum Materials · Michael Raymer
From 25:17, Henning Weier of the company qutools runs a live experimental demonstration of a Bell-inequality violation, so you see the correlations of this section measured on real equipment rather than computed on paper. The same lecture discusses possible loopholes at 49:47 and asks at 1:22:31 whether local realism fails.
Lecture · JQI
JQInews · Ronald Hanson
Ronald Hanson of QuTech in Delft, whose team ran the 2015 diamond experiment in this section, speaking in 2016 on 'From a loophole-free Bell test to a quantum Internet'. The start jumps to Bell's theorem as the CHSH game (19:18); then come what 'loophole free' demands (22:57), Bell's own event-ready-detector idea (27:27) and the first loophole-free test (42:04).
Lecture · MIT
MIT OpenCourseWare · Allan Adams · 2013
A full MIT 8.04 lecture by Allan Adams. The first part previews quantum computing (the no-cloning theorem, met briefly in Part 5 and fully in Chapter 24, and the Deutsch–Jozsa algorithm of Chapter 23); the last part is devoted to the EPR experiment and Bell's inequality, the ideal bridge from this chapter to the next. Best watched after the lesson.
Lecture · Nobel Prize
Nobel Prize · Alain Aspect · 2022
"From Einstein's doubts to quantum technologies": Alain Aspect on his Orsay experiments of the early 1980s, which tested Bell's inequality with fast-switching polarizers, and on how entanglement went from philosophical puzzle to technological resource.
Lecture · Nobel Prize
Nobel Prize · John F. Clauser · 2022
"Experimental proof that nonlocal quantum entanglement is real": John Clauser on the 1972 Freedman–Clauser experiment at Berkeley, the first experimental test of a Bell inequality, and what it took to build it.
Lecture · Nobel Prize
Nobel Prize · Anton Zeilinger · 2022
"A Voyage through Quantum Wonderland": Anton Zeilinger on quantum teleportation, entanglement swapping and loophole-free Bell tests, told by the physicist whose group performed many of those experiments.
Explainer · YouTube
PBS Space Time
Space Time's account of the 2022 prize goes deeper into why Bell's idea needed half a century of ever more careful experiments before physicists considered the case closed. Best watched after Parts 5 and 6, when the loopholes will make sense.
Explainer · YouTube
minutephysics
Made with 3Blue1Brown, this reaches the same contradiction by a different road: three polarising filters and a Venn diagram that pre-written answers cannot satisfy. Compare its counting argument with the CHSH card argument in Part 3.