*Shahriar S. Afshar - Waving Copenhagen Good-bye: Were the founders of Quantum Mechanics wrong?(Harvard+University+HEPL,+42+Oxford+St.,+3rd+Fl.+Conf.+Rm.)
Mar 23, 2004
3:00p
Description *Please Note Date Change*<p>

Waving Copenhagen Good-bye: Were the founders of Quantum Mechanics wrong?<p>

Shahriar S. Afshar - Harvard University Physics Department Associate<p>

Violation of Bohr's Principle of Complementarity in an optical "which-way" experiment: Wave-particle duality has been a persistent enigma in the history of optics for more than two thousand years. With the advent of Quantum mechanics and following the famous Bohr-Einstein debate, Niels Bohr put forward his celebrated Principle of complementarity (PC) which allows presence of sharp wave-like and particle-like behaviors, only in mutually exclusive experiments. In a welcher weg or "which-way" experiment we can obtain perfect knowledge about the origin and path of quantum particles (particle-like behavior), but this action must lead to a complete destruction of the interference pattern (wave-like behavior). I will report a novel quantum optical "which-way" experiment, currently being duplicated at HEPL, which violates the predictions of PC. It seems that we can now finally settle the Bohr-Einstein debate in favor of Einstein! If time permits, we can also run a demonstration of the experiment after the seminar.<p>

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Contact name: Shahriar+S.+Afshar
Contact e-mail: afshar@physics.harvard.edu
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Source Calendar: Experimental Particle Physics Seminars

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