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Title: Correlations and thermalization in driven cavity arrays

Abstract

We show that long-distance steady-state quantum correlations (entanglement) between pairs of cavity-atom systems in an array of lossy and driven coupled resonators can be established and controlled. The maximal of entanglement for any pair is achieved when their corresponding direct coupling is much smaller than their individual couplings to the third party. This effect is reminiscent of the coherent trapping of the three-level atoms using two classical coherent fields. Different geometries for coherent control are considered. For finite temperature, the steady state of the coupled lossy atomcavity arrays with driving fields is in general not a thermal state. Using an appropriate distance measure for quantum states, we find that the change rate of the degree of thermalization with respect to the driving strength is consistent with the entanglement of the system.

Authors:
 [1];  [2];  [1];  [3];  [1];  [2];  [4]
  1. Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543 (Singapore)
  2. (Singapore)
  3. (Greece)
  4. School of Science and Technology, University of Camerino, 62032 Camerino (Italy)
Publication Date:
OSTI Identifier:
21611641
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1384; Journal Issue: 1; Conference: S. N. Bose National Centre for Basic Sciences silver jubilee symposium: 75 Years of quantum entanglement: foundations and information theoretic applications, Kolkata (India), 6-10 Jan 2011; Other Information: DOI: 10.1063/1.3635860; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; CAVITY RESONATORS; CORRELATIONS; COUPLING; DISTANCE; FIELD THEORIES; GEOMETRY; QUANTUM ENTANGLEMENT; QUANTUM MECHANICS; QUANTUM STATES; STEADY-STATE CONDITIONS; THERMALIZATION; TRAPPING; ELECTRONIC EQUIPMENT; EQUIPMENT; MATHEMATICS; MECHANICS; RESONATORS; SLOWING-DOWN

Citation Formats

Dai Li, Department of Physics, National University of Singapore, 2 Science Drive 3 Singapore 117542, Angelakis, Dimitris G., Science Department, Technical University of Crete, Chania, Crete, 73100, Kwek, Leong Chuan, National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, and Mancini, S. Correlations and thermalization in driven cavity arrays. United States: N. p., 2011. Web. doi:10.1063/1.3635860.
Dai Li, Department of Physics, National University of Singapore, 2 Science Drive 3 Singapore 117542, Angelakis, Dimitris G., Science Department, Technical University of Crete, Chania, Crete, 73100, Kwek, Leong Chuan, National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, & Mancini, S. Correlations and thermalization in driven cavity arrays. United States. doi:10.1063/1.3635860.
Dai Li, Department of Physics, National University of Singapore, 2 Science Drive 3 Singapore 117542, Angelakis, Dimitris G., Science Department, Technical University of Crete, Chania, Crete, 73100, Kwek, Leong Chuan, National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, and Mancini, S. Fri . "Correlations and thermalization in driven cavity arrays". United States. doi:10.1063/1.3635860.
@article{osti_21611641,
title = {Correlations and thermalization in driven cavity arrays},
author = {Dai Li and Department of Physics, National University of Singapore, 2 Science Drive 3 Singapore 117542 and Angelakis, Dimitris G. and Science Department, Technical University of Crete, Chania, Crete, 73100 and Kwek, Leong Chuan and National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616 and Mancini, S.},
abstractNote = {We show that long-distance steady-state quantum correlations (entanglement) between pairs of cavity-atom systems in an array of lossy and driven coupled resonators can be established and controlled. The maximal of entanglement for any pair is achieved when their corresponding direct coupling is much smaller than their individual couplings to the third party. This effect is reminiscent of the coherent trapping of the three-level atoms using two classical coherent fields. Different geometries for coherent control are considered. For finite temperature, the steady state of the coupled lossy atomcavity arrays with driving fields is in general not a thermal state. Using an appropriate distance measure for quantum states, we find that the change rate of the degree of thermalization with respect to the driving strength is consistent with the entanglement of the system.},
doi = {10.1063/1.3635860},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1384,
place = {United States},
year = {2011},
month = {9}
}