Strong squeezing and robust entanglement in cavity electromechanics

Abstract

We investigate nonlinear effects in an electromechanical system consisting of a superconducting charge qubit coupled to transmission line resonator and a nanomechanical oscillator, which in turn is coupled to another transmission line resonator. The nonlinearities induced by the superconducting qubit and the optomechanical coupling play an important role in creating optomechanical entanglement as well as the squeezing of the transmitted microwave field. We show that strong squeezing of the microwave field and robust optomechanical entanglement can be achieved in the presence of moderate thermal decoherence of the mechanical mode. We also discuss the effect of the coupling of the superconducting qubit to the nanomechanical oscillator on the bistability behaviour of the mean photon number.

Published version

References in corpus (4)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Optomechanical entanglement between a movable mirror and a cavity field
• Cavity Optomechanics
• Nanomechanical squeezing with detection via a microwave cavity

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• Entanglement between exciton and mechanical modes via dissipation-induced coupling
• Effects of linear and quadratic dispersive couplings on optical squeezing in an optomechanical system
• Quantum Optical Response of a Hybrid Optomechanical Device embedded with a Qubit
• Raman Modes Non-classicality through Entangled Photons Coupling to Plasmonic Modes