Using a quantum dot system to realize perfect state transfer

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

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.

Keywords: quantum communication spin chain quantum dot

Received: 27 January 2011
Revised: 14 May 2011
Accepted manuscript online:

PACS:	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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Li Ji(李季), Wu Shi-Hai(吴世海), Zhang Wen-Wen(张雯雯), and Xi Xiao-Qiang(惠小强) Using a quantum dot system to realize perfect state transfer 2011 Chin. Phys. B 20 100308

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