A Phenomenon of Decoherence Induced by Chaotic Environment

A Phenomenon of Decoherence Induced by Chaotic Environment
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混沌环境引起的退相干现象

DOI:
10.1088/0256-307x/32/3/030301
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发表时间:
2015-02
影响因子:
3.5
通讯作者:
Wang Wen-Ge
Wang Wen-Ge
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yang Yin-Biao;Wang Wen-Ge

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通过数值模拟,揭示了大环境混沌运动引起的退相干现象。研究了当退相干发生时,在环境的Hilbert空间中用随机选取的矢量代替整个系统状态矢量中的环境分量的可能性。结果表明,在未来的演变,约化密度矩阵,以这种方式获得的是相当接近的计算从精确的,连续的薛定谔演化的整个系统。在替换元件时改变哈密顿量的情况下也发现了类似的结果。
By means of numerical simulation, we reveal a phenomenon which is due to decoherence induced by chaotic motion of a large environment. We study the possibility of replacing the environmental components of the state vector of the total system by some randomly-chosen vectors in the Hilbert space of the environment when decoherence has happened. It is shown that, in the future evolution, the reduced density matrices obtained in this way are quite close to those computed from the exact, continuous Schrodinger evolution of the total system. Similar results are also found in the case that the Hamiltonian is changed at the time of replacing components.
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