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The European Physical Journal D

, Volume 58, Issue 1, pp 147–151 | Cite as

Entanglement dynamics of multiqubit system in Markovian and non-Markovian reservoirs

Quantum Information

Abstract

We study the entanglement dynamics of three qubits in contact with independent Markovian or non-Markovian reservoirs. The qubits are prepared in two types of GHZ-like or W-like states distinguished by initial excited-state populations. Though belonging to the same GHZ or W class of entanglement, the states with different initial excitations exhibit strikingly different dynamics. In addition, we show that the non-Markovian reservoirs can recover the multiqubit entanglement at instantaneous points or after a finite interval of entanglement disappearance. We also investigate the protection of multiqubit entanglement by the control of excitation emission via the detuning.

Keywords

Entanglement Dynamic Entanglement Sudden Death Initial Excitation Multipartite Entanglement Tripartite Entanglement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of Physics, Qufu Normal UniversityShandong Provincial Key Laboratory of Laser Polarization and Information TechnologyQufuP.R. China
  2. 2.Department of Chemistry and Chemical EngineeringJining UniversityQufuP.R. China

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