Observations of a PT-like phase transition and limit cycle oscillations in non-reciprocally coupled optomechanical oscillators levitated in vacuum
arXiv:2310.03701 · doi:10.1038/s41567-024-02590-1
Abstract
Nanoparticles levitated in an optical trap provide a versatile platform to study mechanical oscillators in a controlled environment with tuneable parameters. Recently, it has become possible to couple two of these optomechanical oscillators. Here, we demonstrate the collective non-Hermitian dynamics of such a pair of non-conservatively coupled oscillators. We take advantage of the tunability of the optical interactions between the particles in our system and set the optical interaction between the particles to be purely non-reciprocal. By continuously varying the relative power of the trapping beams, we take the system through a transition, similar to a parity-time phase transition. A Hopf bifurcation at a critical point results in the formation of collective limit cycle oscillations, resembling those observed in phonon lasers. These coupled levitated oscillators provide a platform for exceptional point optomechanical sensing and can be extended to multi-particle systems, paving the way for the development of topological optomechanical media.
Nat. Phys. (2024)
References in corpus (13)
- Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
- Levitodynamics: Levitation and control of microscopic objects in vacuum
- Observation of Non-Hermitian Skin Effect and Topology in Ultracold Atoms
- Simultaneous ground-state cooling of two mechanical modes of a levitated nanoparticle
- Observation of strong and tunable light-induced dipole-dipole interactions between optically levitated nanoparticles
- Nonlinear multi-frequency phonon lasers with active levitated optomechanics
- Photonic Metamaterial Analogue of a Continuous Time Crystal
- Non-Hermitian dynamics and nonreciprocity of optically coupled nanoparticles
- Simultaneous cooling of all six degrees of freedom of an optically levitated nanoparticle by elliptic coherent scattering
- Force-Gradient Sensing and Entanglement via Feedback Cooling of Interacting Nanoparticles
- Systems of coupled PT-symmetric oscillators
- PT Symmetry, induced mechanical lasing and tunable force sensing in a coupled-mode optically levitated nanoparticle
- Arbitrary Non-equilibrium Steady State Construction with a Levitated Nanoparticle
Cited by in corpus (13)
- Non-Hermitian dynamics and nonreciprocity of optically coupled nanoparticles
- Quantum Optical Binding of Nanoscale Particles
- Quantum theory of non-Hermitian optical binding between nanoparticles
- Radiation forces and torques in optics and acoustics
- Nanomechanical State Amplifier Based on Optical Inverted Pendulum
- Synchronization and exceptional points in nonreciprocal active polar mixtures
- Optical Levitation of Arrays of Microspheres
- Demonstration of a Tunable Non-Hermitian Nonlinear Microwave Dimer
- More is less in unpercolated active solids
- Coherent control of levitated nanoparticles via dipole-dipole interaction
- Higher symmetry breaking and non-reciprocity in a driven-dissipative Dicke model
- Quantum Dynamical Signatures of Topological Flow Transitions in Limit Cycle Phases
- Sympathetic Cooling of Levitated Optomechanics through Nonreciprocal Coupling