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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 8 — Aug. 1, 2012
  • pp: 2074–2079

Protecting quantum correlations of two qubits in independent non-Markovian environments by bang-bang pulses

Hang-Shi Xu and Jing-bo Xu  »View Author Affiliations


JOSA B, Vol. 29, Issue 8, pp. 2074-2079 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002074


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Abstract

We investigate how to protect quantum correlations for two qubits each locally interacting with its own non-Markovian environment by making use of bang-bang pulses. It is shown that the quantum discord dynamics presents the phenomenon of sudden change for some certain initial states. We also find that the amount of quantum correlation between two qubits can be improved by applying a train of pulses and protected more effectively with shorter interval pulses or longer reservoir correlation time.

© 2012 Optical Society of America

OCIS Codes
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: April 6, 2012
Revised Manuscript: June 6, 2012
Manuscript Accepted: June 17, 2012
Published: July 20, 2012

Citation
Hang-Shi Xu and Jing-bo Xu, "Protecting quantum correlations of two qubits in independent non-Markovian environments by bang-bang pulses," J. Opt. Soc. Am. B 29, 2074-2079 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-8-2074


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