Sympathetic Cooling of Levitated Optomechanics through Nonreciprocal Coupling

• URL: http://arxiv.org/abs/2512.03690v1
• Date: Wed, 03 Dec 2025 11:31:24 GMT
• Title: Sympathetic Cooling of Levitated Optomechanics through Nonreciprocal Coupling
• Authors: Jialin Li, Guangyu Zhang, Zhang-qi Yin,
• Abstract summary: We propose a non-Hermitian optomechanical cooling scheme through nonreciprocal coupling between two levitated nanoparticles.<n>Nonreciprocity enhances directional energy transfer, enabling the target particle to reach a lower phonon occupation than is achievable in conventional cavity cooling.
• Score: 3.415941877160329
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optomechanical cooling of levitated nanoparticles has become an essential topic in modern quantum physics, providing a platform for exploring macroscopic quantum phenomena and high-precision sensing. However, conventional cavity-assisted cooling is fundamentally constrained by cavity dissipation and environmental noise, limiting the attainable minimum temperature. In this work, we propose a non-Hermitian optomechanical cooling scheme through nonreciprocal coupling between two levitated nanoparticles, where one particle is directly cooled by an optical cavity and the other is cooled indirectly through a non-Hermitian interaction. Both analytical solutions and numerical simulations reveal that increasing nonreciprocity enhances directional energy transfer, enabling the target particle to reach a lower phonon occupation than is achievable in conventional cavity cooling. This study demonstrates a new cooling mechanism driven by non-Hermitian interactions, offering theoretical guidance for realizing controllable energy flow and deep cooling in levitated optomechanical systems, and paving the way for future developments in quantum control and sensing technologies.

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