The Einstein-Podolsky-Rosen paradox for energy-time variables

A new variant of the Einstein--Podolsky--Rosen experiment is discussed which illustrates the complementarity principle and the indeterminancy relations for the energy and the time of creation of photons emitted as correlated pairs in the decay of a metastable state of an atom or in parametric scattering of light. It is shown that it is not possible \emph{a priori} to ascribe to such photons a definite temporal structure; it acquires an operational meaning only after one of the photons of the pair is recorded by a detector with a definite frequency characteristic. A simple interpretation of the effect is possible by means of an advanced wave emitted by one of the detectors at the instant of the photon being recorded.

PACS: 03.65.Ud, 42.50.Ar, 42.50.Ct, 42.50.Md (all)
DOI: 10.1070/PU1989v032n06ABEH002730
URL: https://ufn.ru/en/articles/1989/6/f/
Citation: Klyshko D N "The Einstein-Podolsky-Rosen paradox for energy-time variables" Sov. Phys. Usp. 32 555–563 (1989)

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Оригинал: Клышко Д Н «Парадокс Эйнштейна – Подольского – Розена для наблюдаемых «энергия – время»» УФН 158 327–341 (1989); DOI: 10.3367/UFNr.0158.198906g.0327

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