Decoherence of two-qubit system in a non-Markovian squeezed reservoir |
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| Authors: | Wang Fa-Qiang Zhang Zhi-Ming and Liang Rui-Sheng |
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| Affiliation: | Laboratory of Photonic Information Technology, School of Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China |
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| Abstract: | The decoherence of two initially entangled qubits coupled with a
squeezed vacuum cavity separately is investigated exactly. The
results show that, first, in principle, the disentanglement time
decreases with the increase of squeeze parameter r, due to the
augmenting of average photon number of every mode in the squeezed
vacuum cavity. Second, there appear entanglement revivals after the
complete disentanglement for the case of even parity initial Bell
state, while there occur the entanglement decrease and the
entanglement revival before the complete disentanglement for the
case of odd parity initial Bell state. The results are quite
different from those for the case of qubits in a vacuum cavity. |
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| Keywords: | decoherence squeezed reservoir non-Markovian qubit |
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