Robust entanglement of a micromechanical resonator with output optical fields

Details Robust entanglement of a micromechanical resonator with output optical fields Robust entanglement of a micromechanical resonator with output optical fields

2008-06-12

arxiv.org/abs/0806.2045v1

Phys. Rev. A 78, 032316 (2008)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.78.032316

We perform an analysis of the optomechanical entanglement between the experimentally detectable output field of an optical cavity and a vibrating cavity end-mirror. We show that by a proper choice of the readout (mainly by a proper choice of detection bandwidth) one can not only detect the already predicted intracavity entanglement but also optimize and increase it. This entanglement is explained as being generated by a scattering process owing to which strong quantum correlations between the mirror and the optical Stokes sideband are created. All-optical entanglement between scattered sidebands is also predicted and it is shown that the mechanical resonator and the two sideband modes form a fully tripartite-entangled system capable of providing practicable and robust solutions for continuous variable quantum communication protocols.

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