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Title: Steady-state entanglement and normal-mode splitting in an atom-assisted optomechanical system with intensity-dependent coupling

Abstract

In this paper, we study theoretically bipartite and tripartite continuous variable entanglement as well as normal-mode splitting in a single-atom cavity optomechanical system with intensity-dependent coupling. The system under consideration is formed by a Fabry-Perot cavity with a thin vibrating end mirror and a two-level atom in the Gaussian standing wave of the cavity mode. We first derive the general form of the Hamiltonian describing the tripartite intensity-dependent atom-field-mirror coupling due to the presence of the cavity mode structure. We then restrict our treatment to the first vibrational sideband of the mechanical resonator and derive a tripartite atom-field-mirror Hamiltonian. We show that when the optical cavity is intensely driven, one can generate bipartite entanglement between any pair in the tripartite system and that, due to entanglement sharing, atom-mirror entanglement is efficiently generated at the expense of optical-mechanical and optical-atom entanglement. We also find that in such a system, when the Lamb-Dicke parameter is large enough, one can simultaneously observe the normal mode splitting into three modes.

Authors:
 [1];  [2]; ;  [3]
  1. Department of Physics, Faculty of Science, University of Isfahan, Hezar Jerib, 81746-73441, Isfahan (Iran, Islamic Republic of)
  2. (Italy)
  3. Quantum Optics Group, Department of Physics, Faculty of Science, University of Isfahan, Hezar Jerib, 81746-73441, Isfahan (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22095738
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; CAVITY RESONATORS; COUPLING; FABRY-PEROT INTERFEROMETER; HAMILTONIANS; MIRRORS; QUANTUM ENTANGLEMENT; STANDING WAVES; STEADY-STATE CONDITIONS; VIBRATIONAL STATES

Citation Formats

Barzanjeh, Sh., School of Science and Technology, Physics Division, Universita di Camerino, I-62032 Camerino, Naderi, M. H., and Soltanolkotabi, M. Steady-state entanglement and normal-mode splitting in an atom-assisted optomechanical system with intensity-dependent coupling. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.063850.
Barzanjeh, Sh., School of Science and Technology, Physics Division, Universita di Camerino, I-62032 Camerino, Naderi, M. H., & Soltanolkotabi, M. Steady-state entanglement and normal-mode splitting in an atom-assisted optomechanical system with intensity-dependent coupling. United States. doi:10.1103/PHYSREVA.84.063850.
Barzanjeh, Sh., School of Science and Technology, Physics Division, Universita di Camerino, I-62032 Camerino, Naderi, M. H., and Soltanolkotabi, M. Thu . "Steady-state entanglement and normal-mode splitting in an atom-assisted optomechanical system with intensity-dependent coupling". United States. doi:10.1103/PHYSREVA.84.063850.
@article{osti_22095738,
title = {Steady-state entanglement and normal-mode splitting in an atom-assisted optomechanical system with intensity-dependent coupling},
author = {Barzanjeh, Sh. and School of Science and Technology, Physics Division, Universita di Camerino, I-62032 Camerino and Naderi, M. H. and Soltanolkotabi, M.},
abstractNote = {In this paper, we study theoretically bipartite and tripartite continuous variable entanglement as well as normal-mode splitting in a single-atom cavity optomechanical system with intensity-dependent coupling. The system under consideration is formed by a Fabry-Perot cavity with a thin vibrating end mirror and a two-level atom in the Gaussian standing wave of the cavity mode. We first derive the general form of the Hamiltonian describing the tripartite intensity-dependent atom-field-mirror coupling due to the presence of the cavity mode structure. We then restrict our treatment to the first vibrational sideband of the mechanical resonator and derive a tripartite atom-field-mirror Hamiltonian. We show that when the optical cavity is intensely driven, one can generate bipartite entanglement between any pair in the tripartite system and that, due to entanglement sharing, atom-mirror entanglement is efficiently generated at the expense of optical-mechanical and optical-atom entanglement. We also find that in such a system, when the Lamb-Dicke parameter is large enough, one can simultaneously observe the normal mode splitting into three modes.},
doi = {10.1103/PHYSREVA.84.063850},
journal = {Physical Review. A},
issn = {1050-2947},
number = 6,
volume = 84,
place = {United States},
year = {2011},
month = {12}
}