Harmonic entanglement in a degenerate parametric down conversion

Details Harmonic entanglement in a degenerate parametric down conversion Harmonic entanglement in a degenerate parametric down conversion

2007-07-25

arxiv.org/abs/0707.3684v1

Physics

Quantum Physics

7 pages, 5 figures

Scientific paper

We study the harmonic entanglement and squeezing in a two-mode radiation produced in a degenerate parametric down conversion process coupled to a two-mode vacuum reservoir employing the linearization procedure. It is found that there is a quadrature entanglement between the harmonically related fundamental and second-harmonic modes and the superimposed radiation exhibits a significant two-mode squeezing. The entanglement exits even when there is no two-mode squeezing, since the correlation leading to these phenomena are essentially different. In addition, the more the external coherent light is down converted, the more stronger the entanglement and mean photon number of the two-mode radiation would be which is not generally true for squeezing.

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