The quest for three-color entanglement: experimental investigation of new multipartite quantum correlations

Details The quest for three-color entanglement: experimental investigation of new multipartite quantum correlations The quest for three-color entanglement: experimental investigation of new multipartite quantum correlations

2007-09-21

arxiv.org/abs/0709.3335v1

Physics

Quantum Physics

10 pages, 5 figures, submitted to Opt. Express

Scientific paper

10.1364/OE.15.018236

We experimentally investigate quadrature correlations between pump, signal, and idler fields in an above-threshold optical parametric oscillator. We observe new quantum correlations among the pump and signal or idler beams, as well as among the pump and a combined quadrature of signal and idler beams. A further investigation of unforeseen classical noise observed in this system is presented, which hinders the observation of the recently predicted tripartite entanglement. In spite of this noise, current results approach the limit required to demonstrate three-color entanglement.

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