Preservation of Quantum Coherence for Gaussian-State Dynamics in a Non-Markovian Process

文军; 李冠强

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Preservation of Quantum Coherence for Gaussian-State Dynamics in a Non-Markovian Process

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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 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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《中国物理快报：英文版》 |2018年第6期|1-5|共5页
作者
文军; 李冠强;
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作者单位

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics;

Wuhan Institute of Physics and Mathematics;

Chinese Academy of Sciences;

Wuhan 430071;

University of the Chinese Academy of Sciences;

Beijing 100049;

School of Arts and Sciences;

Shaanxi University of Science and Technology;

Xi'an 710021;

Department of Applied Physics and Key Laboratory for Quantum Information and Quantum Optoelectronic Devices of Shaanxi Province;

Xi'an Jiaotong University;

Xi'an 710049;

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原文格式 PDF
正文语种 chi
中图分类量子论;科学学;
关键词
量子信息科学; 科学研究; 物理学; 理论分析;

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Preservation of Quantum Coherence for Gaussian-State Dynamics in a Non-Markovian Process

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