Literature DB >> 17303748

Experimental realization of Wheeler's delayed-choice gedanken experiment.

Vincent Jacques1, E Wu, Frédéric Grosshans, François Treussart, Philippe Grangier, Alain Aspect, Jean-François Roch.   

Abstract

Wave-particle duality is strikingly illustrated by Wheeler's delayed-choice gedanken experiment, where the configuration of a two-path interferometer is chosen after a single-photon pulse has entered it: Either the interferometer is closed (that is, the two paths are recombined) and the interference is observed, or the interferometer remains open and the path followed by the photon is measured. We report an almost ideal realization of that gedanken experiment with single photons allowing unambiguous which-way measurements. The choice between open and closed configurations, made by a quantum random number generator, is relativistically separated from the entry of the photon into the interferometer.

Year:  2007        PMID： 17303748     DOI： 10.1126/science.1136303

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  21 in total

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