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arXiv:2511.17244 · Physical Review A

Optical entanglement facilitated by a hot mechanical oscillator

Aleksandr V. Karpenko, Andrey B. Matsko, Sergey P. Vyatchanin

quant-phphysics.opticsSubmitted Nov 21, 2025• Announced Nov 24, 2025• 0 citations• Revised Aug 28, 2026 (v3)
v1 · Nov 21, 2025v2 · Dec 2, 2025v3 · Aug 28, 2026
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Abstract

Optomechanical generation of entangled optical beams is usually hindered by thermal noise. We present a theoretical study of low frequency entanglement generation between two optical harmonics emitted from a cavity optomechanical system operating in the resolved-sideband regime. The system comprises three nearly equidistant optical modes in a high-finesse cavity, with the central mode coherently driven. This configuration enables radiation-pressure interactions that generate strong quantum correlations between the two sideband modes. Remarkably, these correlations persist even at large numbers of thermal quanta if one properly engineers the optical cooling rate of the mechanical mode. Our findings demonstrate the feasibility of robust entanglement under ambient conditions, opening new avenues for hybrid quantum technologies based on mechanical interfaces and continuous-variable quantum information processing.

Journal reference
Phys. Rev. A 114, 023510 (2026)
DOI
10.1103/n1b6-4nj7
Comments
13 pages, 9 figures

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