Experimental Realization of Wheeler's Delayed-Choice Gedanken Experiment-Reference-Cited by-同舟云学术

Experimental Realization of Wheeler's Delayed-Choice Gedanken Experiment

Published:2007-02-16 Issue:5814 Volume:315 Page:966-968
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Jacques Vincent¹²³,Wu E¹²³,Grosshans Frédéric¹²³,Treussart François¹²³,Grangier Philippe¹²³,Aspect Alain¹²³,Roch Jean-François¹²³

Affiliation:

1. Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan, UMR CNRS 8537, 94235 Cachan, France.

2. Key Laboratory of Optical and Magnetic Resonance Spectroscopy, East China Normal University, 200062 Shanghai, China.

3. Laboratoire Charles Fabry de l'Institut d'Optique, Campus Polytechnique, UMR CNRS 8501, 91127 Palaiseau, France.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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