Peng-Bo Li, Shao-Yan Gao, Fu-Li Li
We investigate a circuit cavity electromechanical system, where two superconducting coplanar waveguide cavities (CPWC's) are capacitively coupled by a nanoscale mechanical resonator (MR). We show that, with this electromechanical system, two-mode continuous-variable entangled states of microwave electromagnetic fields can be synthesized deterministically either via coherent control on the dynamics of the system, or through a dissipative quantum dynamical process. The first scheme operates in the strong coupling regime, and is insensitive to the initial thermal noise, while the second one exploits the mechanical dissipation as a useful resource and only needs high frequency low-Q mechanical oscillators. These protocols may open up promising perspectives for quantum information processing with cavity electromechanics.
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http://arxiv.org/abs/1301.5690
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