Mirror-field entanglement in a microscopic model for quantum optomechanics

Kanupriya Sinha, Shih Yuin Lin, B. L. Hu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We use a microscopic model, the mirror-oscillator-field (MOF) model proposed by C. R. Galley, R. O. Behunin, and B. L. Hu [Phys. Rev. A 87, 043832 (2013)PLRAAN1050-294710.1103/PhysRevA.87.043832], to describe the quantum entanglement between a mirror's center-of-mass (c.m.) 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 c.m., 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 c.m. 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 result which highlights the importance of including the internal structure of the mirror in quantum optomechanical considerations.

Original languageEnglish
Article number023852
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume92
Issue number2
DOIs
Publication statusPublished - 2015 Aug 28

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mirrors
degrees of freedom
center of mass
oscillators
radiation pressure
mechanical properties
optics
boundary conditions

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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Mirror-field entanglement in a microscopic model for quantum optomechanics. / Sinha, Kanupriya; Lin, Shih Yuin; Hu, B. L.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 92, No. 2, 023852, 28.08.2015.

Research output: Contribution to journalArticle

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