Two-photon spatial coherence in a two-photon temporal coherence experiment

Details Two-photon spatial coherence in a two-photon temporal coherence experiment Two-photon spatial coherence in a two-photon temporal coherence experiment

2012-01-15

arxiv.org/abs/1201.3111v1

Physics

Quantum Physics

Scientific paper

Two-photon interference is a fundamental phenomenon in quantum mechanics and stands at the base of numerous experimental observations. Here another manifestation of this phenomenon is described, taking place at the beam splitter in photon counting experiments. A way of measuring this new manifestation is discussed. Specifically it is shown how the $r^2+t^2$ term which is behind previous observations of two-photon interference, may be observed also in photon counting experiments. This serves to emphasize the fundamental similarity between all two-photon experiments. Finally, two-photon states impinging on a Y junction are shown to exhibit two-particle quantum amplification.

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