Investigation of intrinsic nonlinear effects in driven-dissipative optomechanical systems using the generalized linear response theory

• URL: http://arxiv.org/abs/2502.10302v1
• Date: Fri, 14 Feb 2025 17:06:33 GMT
• Title: Investigation of intrinsic nonlinear effects in driven-dissipative optomechanical systems using the generalized linear response theory
• Authors: B. Askari, A. Dalafi, M. J. Kazemi,
• Abstract summary: We study the effects of intrinsic nonlinear optomechanical interaction on the linear response of a driven-dissipative optomechanical system to a weak perturbation.
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• Abstract: In this article, we study the effects of intrinsic nonlinear optomechanical interaction on the linear response of a driven-dissipative optomechanical system to a weak time-dependent perturbation. By calculating the linear response of the cavity optical mode to a weak probe laser in the framework of the generalized linear response theory, it is shown how the Stokes and anti-Stokes sideband amplitudes as well as the power reflection coefficient, and the density of states of the cavity optical mode are expressed in terms of photonic retarded Green's functions. Then, we derive the equations of motion of retarded Green's functions of the system from nonlinear quantum Langevin equations and solve them. It is shown that for a single-photon optomechanical coupling of the order of the cavity linewidth, the nonlinear effect does not manifest itself unless the system satisfies a resonance condition, where the frequency of the upper normal mode of the system is twice that of the lower one. Based on the generality of the present approach which works at all regimes, the validity of linearization approximation is also confirmed at the off-resonance regime.

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