Using a quantum dot system to realize perfect state transfer

doi:10.1088/1674-1056/20/10/100308

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Abstract There are some disadvantages to Nikolopoulos et al.'s protocol [Nikolopoulos G M, Petrosyan D and Lambropoulos P 2004 Europhys. Lett. 65 297] where a quantum dot system is used to realize quantum communication. To overcome these disadvantages, we propose a protocol that uses a quantum dot array to construct a four-qubit spin chain to realize perfect quantum state transfer (PQST). First, we calculate the interaction relation for PQST in the spin chain. Second, we review the interaction between the quantum dots in the Heitler-London approach. Third, we present a detailed program for designing the proper parameters of a quantum dot array to realize PQST.

Key words： quantum communication spin chain quantum dot

Received: 27 January 2011 Published: 15 October 2011

:	03.67.Hk	(Quantum communication)
	75.10.Jm	(Quantized spin models, including quantum spin frustration)
	73.63.Kv	(Quantum dots)

Fund:Project supported by the Natural Science Foundation of Shaanxi Province of China (Grant No. 2009JQ8006).

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	Articles by authors
	Li Ji
	Wu Shi-Hai
	Zhang Wen-Wen
	Xi Xiao-Qiang

Cite this article:

Li Ji,Wu Shi-Hai,Zhang Wen-Wen et al . Using a quantum dot system to realize perfect state transfer[J]. Chin. Phys. B, 2011, 20(10):100308.

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http://cpb.iphy.ac.cn/EN/10.1088/1674-1056/20/10/100308 OR http://cpb.iphy.ac.cn/EN/Y2011/V20/I10/100308

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