Realizing mechanical dynamical Casimir effect with low-frequency oscillator

• URL: http://arxiv.org/abs/2408.02308v1
• Date: Mon, 5 Aug 2024 08:38:44 GMT
• Title: Realizing mechanical dynamical Casimir effect with low-frequency oscillator
• Authors: Tian-hao Jiang, Jun Jing,
• Abstract summary: We realize the mechanical dynamical Casimir effect (DCE) in a hybrid optomechanical system. The mechanical energy is found to be directly converted into the output photons through a three-wave-mixing mechanism. It is found that the mechanical frequency can be about two orders of magnitude smaller than the output photons.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We realize the mechanical dynamical Casimir effect (DCE) in a hybrid optomechanical system consisting of a cavity mode, a low-frequency mechanical oscillator, and a two-level atomic system. Described by the effective Hamiltonian, the mechanical energy is found to be directly converted into the output photons through a three-wave-mixing mechanism. It is dramatically distinct from the quantum simulation of a parametric DCE in such as superconducting circuits. Using a master-equation approach, we analyze the system dynamics in various regimes with respect to the ratio of the effective coupling strength and the loss rate of the system. The dynamics under the strong-coupling regime confirms various three-wave-mixing process for creating photons by annihilation of the mechanical and atomic excitations. And that under the weak-coupling regime demonstrates the continuous production of photons by driving both mechanical oscillator and atom. By virtue of the two-level system, our method avoids the rigorous requirement for the high-frequency mechanical oscillator, that was demanded in standard DCE under the double-photon resonance. It is found that the mechanical frequency can be about two orders of magnitude smaller than the output photons.

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