Does Excess Quantum Noise Exist in Spontaneous Processes?

Details Does Excess Quantum Noise Exist in Spontaneous Processes? Does Excess Quantum Noise Exist in Spontaneous Processes?

2002-06-07

arxiv.org/abs/quant-ph/0206042v1

Physics

Quantum Physics

7 pages, 3 figure in the text. Submitted to Optics Communications

Scientific paper

10.1016/S0030-4018(02)01995-8

We investigate the role of excess quantum noise in type-II degenerate parametric down conversion in a cavity with non-orthogonal polarization eigenmodes. Since only two modes are involved we are able to derive an analytical expression for the twin-photon generation rate measured outside the cavity as a function of the degree of mode nonorthogonality. Contrary to recent claims we conclude that there is no evidence of excess quantum noise for a parametric amplifier working so far below threshold that spontaneous processes dominate.

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