Observation of spatial quantum beating with separated photodetectors

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Original languageEnglish
Pages (from-to)54-57
Journal / PublicationPhysical Review Letters
Issue number1
Publication statusPublished - 1988
Externally publishedYes


When signal and idler photons produced in the process of parametric down-conversion are mixed together, and directed to two photodetectors that respond to nonoverlapping optical frequencies centered at 1 and 2, it is found that the joint probability of two-photon detection exhibits a modulation of the form cos(1-2), where c is the path difference. The experimental results are well described by a simple quantum-mechanical analysis. © 1988 The American Physical Society.

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