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Classical and quantum correlations under decoherence

Source: Phys. Rev. A 80, 044102 (2009); doi:10.1103/PhysRevA.80.044102

Published 7 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.65.Ta
    Foundations of quantum mechanics; measurement theory
  • 03.65.Yz
    Decoherence; open systems; quantum statistical methods
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • YEAR: 2009
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PUBLICATION DATA
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J. Maziero,1 L. C. Céleri,1 R. M. Serra,1 and V. Vedral2,3,4
1Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, R. Santa Adélia 166, Santo André 09210-170, SP, Brazil
2Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore
3Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
4Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
Recently some authors have pointed out that there exist nonclassical correlations which are more general, and possibly more fundamental, than entanglement. For these general quantum correlations and their classical counterparts, under the action of decoherence, we identify three general types of dynamics that include a peculiar sudden change in their decay rates. We show that, under suitable conditions, the classical correlation is unaffected by decoherence. Such dynamic behavior suggests an operational measure of both classical and quantum correlations that can be computed without any extremization procedure. ©2009 The American Physical Society
History: Received 7 May 2009; published 7 October 2009
Permalink: http://link.aps.org/abstract/PRA/v80/e044102

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