Coupling librational and translational motion of a levitated nanoparticle in an optical cavity

Abstract

An optically levitated nonspherical nanoparticle can exhibit both librational and translational vibrations due to orientational and translational confinements of the optical tweezer, respectively. Usually, the frequency of its librational mode in a linearly-polarized optical tweezer is much larger than the frequency of its translational mode. Because of the frequency mismatch, the intrinsic coupling between librational and translational modes is very weak in vacuum. Here we propose a scheme to couple its librational and center-of-mass modes with an optical cavity mode. By adiabatically eliminating the cavity mode, the beam splitter Hamiltonian between librational and center-of-mass modes can be realized. We find that high-fidelity quantum state transfer between the librational and translational modes can be achieved with practical parameters. Our work may find applications in sympathetic cooling of multiple modes and quantum information processing.

6 pages, 3 figures

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Cited by in corpus (10)

• Constructing Nano-Object Quantum Superpositions with a Stern-Gerlach Interferometer
• Cavity Optomechanics in a Levitated Helium Drop
• Auxiliary-cavity-assisted ground-state cooling of optically levitated nanosphere in the unresolved-sideband regime
• Parametric Feedback Cooling of Rigid Body Nanodumbbells in Levitated Optomechanics
• Prethermalization and nonreciprocal phonon transport in a levitated optomechanical array
• Simulation of sympathetic cooling an optically levitated magnetic nanoparticle via coupling to a cold atomic gas
• Bistability and squeezing of the librational mode of an optically trapped nanoparticle
• Detection of anisotropic particles in levitated optomechanics
• Employing coupled cavities to increase the cooling rate of a levitated nanosphere in the resolved sideband regime
• Low-energy scattering of ultracold atoms by a dielectric nanosphere