Proposal for entangling remote micromechanical oscillators via optical measurements

Details Proposal for entangling remote micromechanical oscillators via optical measurements Proposal for entangling remote micromechanical oscillators via optical measurements

2011-03-11

arxiv.org/abs/1103.2368v3

Phys. Rev. Lett. 107, 123601 (2011)

Physics

Quantum Physics

4 pages, 2 figures + supplementary material (7 pages, 2 figs). Updates in v2: New Eq. (7) and Fig. 1 - results unchanged. Adde

Scientific paper

10.1103/PhysRevLett.107.123601

We propose an experiment to create and verify entanglement between remote mechanical objects by use of an optomechanical interferometer. Two optical cavities, each coupled to a separate mechanical oscillator, are coherently driven such that the oscillators are laser cooled to the quantum regime. The entanglement is induced by optical measurement and comes about by combining the output from the two cavities to erase which-path information. It can be verified through measurements of degrees of second-order coherence of the optical output field. The experiment is feasible in the regime of weak optomechanical coupling. Realistic parameters for the membrane-in-the-middle geometry suggest entangled state lifetimes on the order of milliseconds.

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