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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry Van Driel
  • Vol. 26, Iss. 7 — Jul. 1, 2009
  • pp: 1289–1294

Sudden death and birth of entanglement effects for Kerr-nonlinear coupler

A. Kowalewska-Kudłaszyk and W. Leoński  »View Author Affiliations

JOSA B, Vol. 26, Issue 7, pp. 1289-1294 (2009)

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We analyze the entanglement dynamics in a nonlinear Kerr-like coupler interacting with external environment. Whenever the reservoir is in a thermal vacuum state, the entanglement (measured by concurrence for a two-qubit system) exhibits regular oscillations of decreasing amplitude. In contrast, for thermal reservoirs we can observe dark periods in concurrence oscillations (which can be called a sudden death of the entanglement) and the entanglement rebuild (which can be named the sudden birth of entanglement). We show that these features can be observed when we deal with two-qubit system as well as qubit–qutrit system.

© 2009 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

Original Manuscript: February 20, 2009
Manuscript Accepted: April 19, 2009
Published: June 8, 2009

A. Kowalewska-Kudłaszyk and W. Leoński, "Sudden death and birth of entanglement effects for Kerr-nonlinear coupler," J. Opt. Soc. Am. B 26, 1289-1294 (2009)

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