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A simple method of preparing pure states of an optical field, of implementing the Einstein-Podolsky-Rosen experiment, and of demonstrating the complementarity principle


Lomonosov Moscow State University, Department of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation

A description is given of a device that periodically transforms a field from the vacuum state to a pure excited state that corresponds to the propagation of two correlated photons. It employs the phenomenon of parametric scattering, i.e., the emission of pairs of photons by a nonlinear crystal excited by a pulsed coherent pump under phase-matched conditions. In accordance with the well-known Einstein--Podolsky--Rosen gedanken experiment, the device can be used to observe the correlation of either the transverse momenta of the photons (when the two detectors are located in the far-field zone) or their transverse coordinates (when the detectors are in the near-field zone). The device may be of interest in photometry, and also from the methodological point of view as a clear demonstration of the EPR paradox and the complementarity of the transverse coordinate and momentum of a photon.

PACS: 42.50.Dv, 42.79.Pw (all)
DOI: 10.1070/PU1988v031n01ABEH002537
URL: https://ufn.ru/en/articles/1988/1/f/
Citation: Klyshko D N "A simple method of preparing pure states of an optical field, of implementing the Einstein-Podolsky-Rosen experiment, and of demonstrating the complementarity principle" Sov. Phys. Usp. 31 74–85 (1988)
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Оригинал: Клышко Д Н «Простой метод приготовления чистых состояний оптического поля, реализации эксперимента Эйнштейна, Подольского, Розена и демонстрации принципа дополнительности» УФН 154 133–152 (1988); DOI: 10.3367/UFNr.0154.198801e.0133

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