Entanglement dynamics of multiqubit system in Markovian and
non-Markovian reservoirs |
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| Authors: | Z X Man Y J Zhang F Su and Y J Xia |
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| Institution: | 1.Department of Physics, Qufu Normal
University,Shandong Provincial Key Laboratory of Laser Polarization
and Information Technology,Qufu,P.R. China;2.Department of Chemistry and
Chemical Engineering,Jining University,Qufu,P.R. China |
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| 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. |
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| Keywords: | |
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