Quantum control limited by quantum decoherence

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	Quantum control limited by quantum decoherence
	Sun, CP; Xue, F; Yu, SX; Xue, F , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
刊名	PHYSICAL REVIEW A
	2006
卷号	73 期号:1 页码:-
关键词	Computation Evolution
ISSN号	1050-2947
英文摘要	We describe quantum controllability under the influences of the quantum decoherence induced by the quantum control itself. It is shown that, when the controller is considered as a quantum system, it will entangle with its controlled system and then cause quantum decoherence in the controlled system. In competition with this induced decoherence, the controllability will be limited by some uncertainty relation in a well-armed quantum control process. In association with the phase uncertainty and the standard quantum limit, a general model is studied to demonstrate the possibility of realizing a decoherence-free quantum control with a finite energy within a finite time. It is also shown that if the operations of quantum control are to be determined by the initial state of the controller, then due to the decoherence which results from the quantum control itself, there exists a low bound for quantum controllability.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000235008900116
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/6059]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Xue, F , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Sun, CP,Xue, F,Yu, SX,et al. Quantum control limited by quantum decoherence[J]. PHYSICAL REVIEW A,2006,73(1):-.
APA	Sun, CP,Xue, F,Yu, SX,&Xue, F , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.(2006).Quantum control limited by quantum decoherence.PHYSICAL REVIEW A,73(1),-.
MLA	Sun, CP,et al."Quantum control limited by quantum decoherence".PHYSICAL REVIEW A 73.1(2006):-.