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arXiv:quant-ph/0611038 · Journal of Physics A Mathematical and Theoretical

Stationary entanglement between two movable mirrors in a classically driven Fabry–Perot cavity

David Vitali, Stefano Mancini, Paolo Tombesi

Published Jun 27, 2007• 106 citations
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Abstract

We consider a Fabry–Perot cavity made by two moving mirrors and driven by an intense classical laser field. We show that stationary entanglement between two vibrational modes of the mirrors, with an effective mass of the order of micrograms, can be generated by means of radiation pressure. The resulting entanglement is however quite fragile with respect to temperature.

DOI
10.1088/1751-8113/40/28/s14

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arXiv:1204.2036•Apr 10, 2012•0 citations
We consider a Fabry–Perot cavity made by two moving mirrors and driven by an intense classical laser field. We show that stationary entanglement between two vibrational modes of the mirrors, with an effective mass of the order of micrograms, can be generated by means of radiation pressure. The resulting entanglement is however quite fragile with respect to temperature.
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The entanglement of the two movable mirrors in a single mode cavity field is studied in an ideal situation without thermal noise. When gn/w <<1 where g is the coupling coefficient between the mirror and the field, w is the mirror' vibration frequency and n is photon number of the cavity field, we work out Wootters concurrence of the system initially with the field in Fock number state and the two mirrors in vacuum states, and find that the states of the mirrors are entangled into space spanned by |0>,|1> via radiation pressure, though the concurrence is very small.