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
Corresponding authors: manzhongxiao@163.com yjxia@mail.qfnu.edu.cn
Received:
2
February
2010
Revised:
1
March
2010
Published online:
13
April
2010
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.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010