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Laser Physics

Entangling nanomechanical oscillators exploiting the squeezed field

Qiong Wang, Zhi He

Published Oct 4, 2018• 4 citations
Publisher

Abstract

Abstract We study the entanglement of nanomechanical oscillators exploiting the squeezed field in an optomechanical cavity. We demonstrate that the entanglement of the nanomechanical oscillators can be enhanced by increasing the photon numbers, and can be observed even though the photon number in the squeezed field is in the single-photon level. Moreover, our work shows this entanglement can somehow be robust against temperature. Specifically, the model under our consideration can be achieved with current techniques.

DOI
10.1088/1555-6611/aae192

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Entanglement and quantum squeezing have wide applications in quantum technologies due to their non-classical characteristics. Here we study entanglement and quantum squeezing in an open spin-optomechanical system, in which a Rabi model (a spin coupled to the mechanical oscillator) is coupled to an ancillary cavity field via a quadratic optomechanical coupling. We find that their performances can be significantly modulated via the photon of the ancillary cavity, which comes from photon-dependent spin-oscillator coupling and detuning. Specifically, a fully switchable spin-oscillator entanglement can be achieved, meanwhile a strong mechanical squeezing is also realized. Moreover, we study the environment-induced decoherence and dissipation, and find that they can be mitigated by increasing the number of photons. This work provides an effective way to manipulate entanglement and quantum squeezing and to suppress decoherence in the cavity quantum electrodynamics with a quadratic optomechanics.