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Condensed Matter > Quantum Gases

arXiv:1811.05158 (cond-mat)
[Submitted on 13 Nov 2018]

Title:Enhancing nanomechanical squeezing by atomic interactions in a hybrid atom-optomechanical system

Authors:Niklas Mann, Michael Thorwart
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Abstract:In a hybrid atom-optomechanical system, the optical coupling of a mechanical mode of a nanomembrane in an optical cavity with a distant interacting atom gas permits highly non-classical quantum many-body states. We show that the mechanical mode can be squeezed by the back-action of internal excitations of the atoms in the gas. A Bogoliubov approach reveals that these internal excitations form a fluctuating environment of quasi-particle excitations for the mechanical mode with a gaped spectral density. Nanomechanical squeezing arises due to quasi-particle excitations in the interacting atom gas when the mechanical frequency is close to resonance with the internal atomic transitions. Interestingly, nanomechanical squeezing is enhanced by atom-atom interactions.
Subjects: Quantum Gases (cond-mat.quant-gas); Quantum Physics (quant-ph)
Cite as: arXiv:1811.05158 [cond-mat.quant-gas]
  (or arXiv:1811.05158v1 [cond-mat.quant-gas] for this version)
  https://doi.org/10.48550/arXiv.1811.05158
Journal reference: Phys. Rev. A 98, 063804 (2018)
Related DOI: https://doi.org/10.1103/PhysRevA.98.063804

Submission history

From: Niklas Mann [view email]
[v1] Tue, 13 Nov 2018 08:20:25 UTC (552 KB)
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