Optimized quantum state transfer through an XY spin chain

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	Optimized quantum state transfer through an XY spin chain
	Liu, Y ; Zhou, DL
刊名	PHYSICAL REVIEW A
	2014
卷号	89 期号:6
ISSN号	1050-2947
通讯作者	Liu, Y (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	Quantum state transfer along a one-dimensional spin chain has become a fundamental ingredient for quantum communication between distant nodes in a quantum network. We study the average fidelity of quantum state transfer (QST) along an XY spin chain by adjusting the basis identification between the first spin and the last spin. In a proper choice of the basis identification, we find that the QST fidelity depends only on the average parity of the initial state linearly. We propose a simple scheme to adjust the basis identification to optimize the average fidelity such that it depends linearly on the absolute value of the average parity. In the case where the absolute value of the average parity is 1 we prove that the fidelity takes the maximum at any time over arbitrary initial state and basis identification.
资助信息	NSF of China [11175247]; NKBRSF of China [2012CB922104, 2014CB921202]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59471]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, Y,Zhou, DL. Optimized quantum state transfer through an XY spin chain[J]. PHYSICAL REVIEW A,2014,89(6).
APA	Liu, Y,&Zhou, DL.(2014).Optimized quantum state transfer through an XY spin chain.PHYSICAL REVIEW A,89(6).
MLA	Liu, Y,et al."Optimized quantum state transfer through an XY spin chain".PHYSICAL REVIEW A 89.6(2014).