non - Markovian decoherence dynamics of entangled coherent states

Jun Hong An, Mang Feng, Wei-Min Zhang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We microscopically model the decoherence dynamics of entangled coherent states of two optical modes under the influence of vacuum fluctuation. We derive an exact master equation with time - dependent coefficients reflecting the memory effect of the environment, by using the Feynman - Vernon influence functional theory in the coherent - state representation. Under the Markov approximation, our master equation recovers the widely used Lindblad equation in quantum optics. We then investigate the non - Markovian entanglement dynamics of the two - mode entangled coherent states under vacuum fluctuation. Compared with the results in Markov limit, it shows that the non - Markovian effect enhances the disentanglement to the initially entangled coherent state. Our analysis also shows that the decoherence behaviors of the entangled coherent states depend on the symmetrical properties of the entangled coherent states as well as the couplings between the optical fields and the environment.

Original languageEnglish
Pages (from-to)317-335
Number of pages19
JournalQuantum Information and Computation
Volume9
Issue number3-4
Publication statusPublished - 2009 Mar 1

Fingerprint

Decoherence
Coherent States
Vacuum
Quantum optics
vacuum
quantum optics
Master Equation
Data storage equipment
Fluctuations
Quantum Optics
Memory Effect
coefficients
approximation
Entanglement
Coefficient
Approximation

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Statistical and Nonlinear Physics
  • Nuclear and High Energy Physics
  • Mathematical Physics
  • Physics and Astronomy(all)
  • Computational Theory and Mathematics

Cite this

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non - Markovian decoherence dynamics of entangled coherent states. / An, Jun Hong; Feng, Mang; Zhang, Wei-Min.

In: Quantum Information and Computation, Vol. 9, No. 3-4, 01.03.2009, p. 317-335.

Research output: Contribution to journalArticle

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