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Concurrence evolution of two qubits coupled with one-mode cavity separately

Chinese Physics B, ISSN: 1674-1056, Vol: 19, Issue: 9, Page: 094204-1-094204-6
2010
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The concurrence evolution of two qubits coupled with one-mode cavity separately is investigated exactly without adopting the rotating-wave approximation. The results show that for the resonant case, the concurrence evolution behaviour of the system is similar to that of the Markovian case when the coupling strength is weak, while the concurrence vanishes in a finite time and might revive fractional initial entanglement before it permanently vanishes when the coupling strength is strong. And for the detuning case, the entanglement could periodically recover after complete disentanglement. These results are quite different from those of system subjected to Jaynes-Cummings model. © 2010 Chinese Physical Society and IOP Publishing Ltd.

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