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PT-like phase transition and limit cycle oscillations in non-reciprocally coupled optomechanical oscillators levitated in vacuum

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Nature Physics, Published online: 25 July 2024; doi:10.1038/s41567-024-02590-1

Non-reciprocal interactions between two optically levitated nanoparticles allow the observation of non-Hermitian dynamics and a mechanical lasing transition, and suggest applications in optomechanical sensing.