Related papers: Effects of Quadratic Optomechanical Coupling on Bipartite Entanglements, Mechanical Ground-State Cooling and Squeezing in an Electro-Optomechanical System

Effects of Quadratic Optomechanical Coupling on Bipartite Entanglements, Mechanical Ground-State Cooling and Squeezing in an Electro-Optomechanical System

URL: http://arxiv.org/abs/2408.06365v1
Date: Sat, 27 Jul 2024 12:45:27 GMT
Title: Effects of Quadratic Optomechanical Coupling on Bipartite Entanglements, Mechanical Ground-State Cooling and Squeezing in an Electro-Optomechanical System
Authors: N. Ghorbani, Ali Motazedifard, M. H. Naderi,
Abstract summary: We study the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system. Such a hybrid electro-optomechanical system can serve as a promising platform to engineer an improved optical-microwave entangled source for microwave sensing as well as quantum information processing.
Score: 0.0
License: http://creativecommons.org/publicdomain/zero/1.0/
Abstract: We theoretically investigate the steady-state bipartite entanglements, mechanical ground-state cooling, and mechanical quadrature squeezing in a hybrid electro-optomechanical system where a moving membrane is linearly coupled to the microwave field mode of an LC circuit, while it simultaneously interacts both linearly and quadratically with the radiation pressure of a single-mode optical cavity. We show that by choosing a suitable sign and amplitude for the quadratic optomechanical coupling (QOC), one can achieve enhanced and thermally robust stationary bipartite entanglement between the subsystems, improved mechanical ground-state cooling, and Q-quadrature squeezing of the mechanical mode beyond the 3-dB limit of squeezing. In particular, we find that in the presence of QOC with positive sign the bipartite optical-microwave entanglement can be increased by about 2.25 times around the temperature of 1mK, and it can be preserved against thermal noise up to the ambient temperature of 90mK. Furthermore, the QOC with positive sign can give rise to the enhancement of the mechanical ground-state cooling by about 1 order of magnitude in the optical and microwave red-detuned regime. We also find that for the positive sign of QOC and near the microwave resonance frequency the squeezing degree of the Q-quadrature of the mechanical mode can be amplified up to 7 dB. Such a hybrid electro-optomechanical system can serve as a promising platform to engineer an improved optical-microwave entangled source for microwave sensing as well as quantum information processing.

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