Eur. Phys. J. D 58, 147-151 (2010)
https://doi.org/10.1140/epjd/e2010-00094-7

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

¹ Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu, 273165, P.R. China
² Department of Chemistry and Chemical Engineering, Jining University, Qufu, 273155, P.R. China

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Received: 2 February 2010
Revised: 1 March 2010
Published online: 13 April 2010

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.