Universality in open system entanglement dynamics

Universality in open system entanglement dynamics
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开放系统纠缠动力学的普遍性

DOI:
10.1088/1751-8113/46/8/085301
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发表时间:
2008
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
A. Buchleitner
A. Buchleitner
中科院分区:
--
文献类型:
--
作者:
M. Tiersch;F. de Melo;A. Buchleitner

文献摘要

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我们证明,在大希尔伯特空间维度的限制下,开放量子系统的纠缠演化对于绝大多数初始纯态来说是相同的。通过对经历局部退相干过程的多量子位系统的负性演化的数值研究来说明分析结果。在许多子系统的限制下,一个子系统与其他子系统之间出现的混合状态纠缠变得更加鲁棒,而对于两个同等大小的分区来说,它变得更加脆弱。
We show that the entanglement evolution of an open quantum system is the same for the vast majority of initial pure states, in the limit of large Hilbert space dimensions. The analytical results are illustrated by a numerical study of the evolution of negativity for many-qubit systems undergoing a local decoherence process. In the limit of many subsystems, the arising mixed state entanglement between one subsystem and the rest grows more robust, whereas for two equally sized partitions it becomes more fragile.