Universality of stationary entanglement in an optomechanical system driven by non-Markovian noise and squeezed light

• URL: http://arxiv.org/abs/2502.02979v2
• Date: Sun, 24 Aug 2025 12:46:37 GMT
• Title: Universality of stationary entanglement in an optomechanical system driven by non-Markovian noise and squeezed light
• Abstract summary: We investigate entanglement between a mechanical oscillator and the reflected coherent optical field in a general, not necessarily Markovian environment.<n>We demonstrate that for a coherent laser drive, either unsqueezed or squeezed in a frequency-independent manner, optomechanical entanglement is destroyed.
• Score: 7.1912497362975225
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optomechanical systems subjected to environmental noise give rise to rich physical phenomena. We investigate entanglement between a mechanical oscillator and the reflected coherent optical field in a general, not necessarily Markovian environment. For the input optical field, we consider stationary Gaussian states and frequency dependent squeezing. We demonstrate that for a coherent laser drive, either unsqueezed or squeezed in a frequency-independent manner, optomechanical entanglement is destroyed after a threshold that depends only on the environmental noises -- independent of the coherent coupling between the oscillator and the optical field, or the squeeze factor. In this way, we have found a universal entangling-disentangling transition. We also show that for a configuration in which the oscillator and the reflected field are separable, entanglement cannot be generated by incorporating frequency-dependent squeezing in the optical field.

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