Four Photon Entanglement from Down Conversion

Details Four Photon Entanglement from Down Conversion Four Photon Entanglement from Down Conversion

2001-03-09

arxiv.org/abs/quant-ph/0103049v1

Physics

Quantum Physics

5 pages, 1 figure, submitted to PRA

Scientific paper

10.1103/PhysRevA.64.010102

Double-pair emission from type-II parametric down conversion results in a highly entangled 4-photon state. Due to interference, which is similar to bunching from thermal emission, this state is not simply a product of two pairs. The observation of this state can be achieved by splitting the two emission modes at beam splitters and subsequent detection of a photon in each output. Here we describe the features of this state and give a Bell theorem for a 4-photon test of local realistic hidden variable theories.

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