Quantum information and the Brain

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Published: Jan. 16, 2013 • VideoLectures.Net • View the talk in context: http://videolectures.net/nips2012_aar... • View the complete 26th Annual Conference on Neural Information Processing Systems (NIPS), Lake Tahoe 2012 : http://videolectures.net/nips2012_lak... • Speaker: Scott Aaronson, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, MIT • License: Creative Commons CC BY-NC-ND 3.0 • More information at http://videolectures.net/site/about/ • More talks at http://videolectures.net/ • Ever since quantum mechanics was discovered nearly a century ago, famous scientists from Eddington to Wigner to Compton to Eccles to Penrose have speculated about possible connections to the brain -- a quest often parodied as quantum mechanics is mysterious, the brain is mysterious, ergo they must be related somehow. In this talk, I'll offer a critical survey of these ideas from the modern standpoint of quantum information theory, pointing out the huge conceptual and experimental problems that have plagued most concrete proposals. However, I'll also explain why I think some role for quantum mechanics in cognition is not yet excluded, and discuss what sorts of advances in neuroscience and physics might help settle the question. • 0:00 Quantum Information and the Brain • 0:33 My challenge • 2:25 On the other hand, there's an obvious Problem of Scale • 5:04 My view • 6:22 Quantum Mechanics in 1 Slide • 8:22 Interference • 11:07 Measurement (1) • 14:02 Measurement (2) • 17:02 Measurement (3) • 17:54 David Deutsch (circa 1970s) • 19:46 Quantum Computing (1) • 22:09 Quantum Computing (2) • 23:32 The Limits of Quantum Computers (1) • 26:44 The Limits of Quantum Computers (2) • 28:05 The Limits of Quantum Computers (3) • 29:44 The Limits of Quantum Computers (4) • 30:50 Can n qubits really contain ~2n classical bits? (1)

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