Using a quantum dot system to realize perfect state transfer

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

中国物理B ›› 2011, Vol. 20 ›› Issue (10): 100308-100308.doi: 10.1088/1674-1056/20/10/100308

Using a quantum dot system to realize perfect state transfer

李季, 吴世海, 张雯雯, 惠小强

School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710061, China

收稿日期:2011-01-27 修回日期:2011-05-14 出版日期:2011-10-15 发布日期:2011-10-15
基金资助:
Project supported by the Natural Science Foundation of Shaanxi Province of China (Grant No. 2009JQ8006).

Using a quantum dot system to realize perfect state transfer

Li Ji(李季), Wu Shi-Hai(吴世海), Zhang Wen-Wen(张雯雯), and Xi Xiao-Qiang(惠小强)^†

School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710061, China

Received:2011-01-27 Revised:2011-05-14 Online:2011-10-15 Published:2011-10-15
Supported by:
Project supported by the Natural Science Foundation of Shaanxi Province of China (Grant No. 2009JQ8006).

摘要/Abstract

摘要： 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.

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

中图分类号: (Quantum communication)

03.67.Hk

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

李季, 吴世海, 张雯雯, 惠小强. Using a quantum dot system to realize perfect state transfer[J]. 中国物理B, 2011, 20(10): 100308-100308.

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[J]. Chin. Phys. B, 2011, 20(10): 100308-100308.

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Using a quantum dot system to realize perfect state transfer

Using a quantum dot system to realize perfect state transfer

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