### 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 language | English |
---|---|

Pages (from-to) | 317-335 |

Number of pages | 19 |

Journal | Quantum Information and Computation |

Volume | 9 |

Issue number | 3-4 |

Publication status | Published - 2009 Mar 1 |

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### 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

*Quantum Information and Computation*,

*9*(3-4), 317-335.

}

*Quantum Information and Computation*, vol. 9, no. 3-4, pp. 317-335.

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

Research output: Contribution to journal › Article

TY - JOUR

T1 - non - Markovian decoherence dynamics of entangled coherent states

AU - An, Jun Hong

AU - Feng, Mang

AU - Zhang, Wei-Min

PY - 2009/3/1

Y1 - 2009/3/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=66349127233&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66349127233&partnerID=8YFLogxK

M3 - Article

VL - 9

SP - 317

EP - 335

JO - Quantum Information and Computation

JF - Quantum Information and Computation

SN - 1533-7146

IS - 3-4

ER -