Extra phase noise from thermal fluctuations in nonlinear optical crystals

Details Extra phase noise from thermal fluctuations in nonlinear optical crystals Extra phase noise from thermal fluctuations in nonlinear optical crystals

2009-06-22

arxiv.org/abs/0906.4071v1

Phys. Rev. A 79, 063816 (2009)

Physics

Quantum Physics

Scientific paper

We show theoretically and experimentally that scattered light by thermal phonons inside a second-order nonlinear crystal is the source of additional phase noise observed in Optical Parametric Oscillators. This additional phase noise reduces the quantum correlations and has hitherto hindered the direct production of multipartite entanglement in a single nonlinear optical system. We cooled the nonlinear crystal and observed a reduction of the extra noise. Our treatment of this noise can be successfully applied to different systems in the literature.

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