Mirror-Field Entanglement in a Microscopic model for Quantum Optomechanics

Abstract

We use a microscopic model, the Mirror-Oscillator-Field (MOF) model proposed by Galley, Behunin and Hu [Phys. Rev. A 87, 043832 (2013)], to describe the quantum entanglement between a mirror's center of mass (CoM) motion and a field. In contrast with the conventional approach where the mirror-field entanglement is understood as arising from the radiation pressure of an optical field inducing the motion of the mirror's CoM, the MOF model incorporates the dynamics of the internal degrees of freedom of the mirror that couple to the optical field directly. The major advantage in this approach is that it provides a self-consistent treatment of the three pertinent subsystems (the mirror's CoM motion, its internal degrees of freedom and the field) including their back-actions on each other, thereby giving a more accurate account of the quantum correlations between the individual subsystems. The optical and the mechanical properties of a mirror arising from its dynamical interaction with a quantum field are obtained without imposing any boundary conditions on the field additionally, as is done in the conventional way. As one of the new physical features that arise from this self-consistent treatment of the coupled optics and mechanics behavior we observe a coherent transfer of quantum correlations from the field to the mirror via its internal degrees of freedom. We find the quantum entanglement between the optical field and the mirror's center of mass motion upon coarse-graining over the internal degree of freedom. Further, we show that in certain parameter regimes the mirror-field entanglement is enhanced when the field interacts resonantly with the mirror's internal degree of freedom, a new result which highlights the importance of including the internal structure of the mirror in quantum optomechanical studies.

18 pages, 5 figures

References in corpus (9)

• Optomechanical entanglement between a movable mirror and a cavity field
• Cavity Opto-Mechanics with a Bose-Einstein Condensate
• Observation of Radiation Pressure Shot Noise on a Macroscopic Object
• Creating and probing macroscoping entanglement with light
• Disentanglement of two harmonic oscillators in relativistic motion
• Scattering theory of cooling and heating in opto-mechanical systems
• Motion of a mirror under infinitely fluctuating quantum vacuum stress
• Exciton-mediated photothermal cooling in GaAs membranes
• The Lorentz Force and the Radiation Pressure of Light

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