Entanglement dynamics in a mechanically coupled double-cavity enhanced by two-level atomic ensembles

Lanxin Chen, Fengxuan Zhang, Mingjiao Xu and Mei Zhang

Chaos, Solitons & Fractals, 2024, vol. 185, issue C

Abstract: We have explored the entanglement dynamics in a mechanically coupled double-cavity enhanced by two-level atomic ensembles. The entanglement between different components can be readily generated and transferred by appropriately choosing the parameters of two atomic ensembles, so that the maximal optomechanical entanglements for stable fixed points of the classical nonlinear counterpart of the system are ultimately achieved. Moreover, the entanglement generation scheme is robust with respect to the ambient temperature, in the sense that the maximal optomechanical entanglement is not completely lost up to T=6 K. We further studied the time evolution of the entanglement in the parameter regimes where the fixed points are no longer stable, and observed that around the classical limit cycles, the optomechanical quantum entanglement also shows time-varying behavior about large average values. Our work has extended the usual time-invariant entanglement generation for stable fixed-point states to entanglement dynamics for more versatile steady states, and the proposed hybrid optomechanical system may serve as a flexible platform for quantum precision measurement as well as exploring the boundary between classical and quantum mechanics.

Keywords: Cavity optomechanical system; Atomic ensemble; Quantum entanglement; Fixed point; Limit cycle (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:185:y:2024:i:c:s0960077924006453

DOI: 10.1016/j.chaos.2024.115093

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