【摘 要】
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Coherence is a key resource in quantum information science.Exactly understanding and controlling the variation of coherence are vital for implementation in real
【机 构】
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State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Phys
论文部分内容阅读
Coherence is a key resource in quantum information science.Exactly understanding and controlling the variation of coherence are vital for implementation in realistic quantum systems.Using P-representation of density matrix,we obtain the analytical solution of the master equation for the classical states in the non-Markovian process and investigate the coherent dynamics of Gaussian states.It is found that quantum coherence can be preserved in such a process if the coupling strength between system and environment exceeds a threshold value.We also discuss the characteristic function of the Gaussian states in the non-Markovian process,which provides an inevitable bridge for the control and operation of quantum coherence.
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