Entanglement and squeezing in a two-mode system: theory and experiment

Details Entanglement and squeezing in a two-mode system: theory and experiment Entanglement and squeezing in a two-mode system: theory and experiment

2003-10-22

arxiv.org/abs/quant-ph/0310139v2

Journal of Optics B 6 (2004) 532

Physics

Quantum Physics

submitted to J. Opt. B for a Special Issue on Foundations of Quantum Optics

Scientific paper

10.1088/1464-4266/6/6/011

We report on the generation of non separable beams produced via the interaction of a linearly polarized beam with a cloud of cold cesium atoms placed in an optical cavity. We convert the squeezing of the two linear polarization modes into quadrature entanglement and show how to find out the best entanglement generated in a two-mode system using the inseparability criterion for continuous variable [Duan et al., Phys. Rev. Lett. 84, 2722 (2000)]. We verify this method experimentally with a direct measurement of the inseparability using two homodyne detections. We then map this entanglement into a polarization basis and achieve polarization entanglement.

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