Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

doi:10.1088/1674-1056/20/10/100307

Abstract We study the state transfer of Bell states in a general XY spin chain using the Dzyaloshinsky-Moriya interaction. Two symmetries of fidelity with the anisotropy parameter are found. The maximum fidelity is shown to be significantly enhanced in cases of an odd number of sites. Enhancement of fidelity on a singlet state is greater than that on the other Bell states in such cases.

Keywords: state transfer XY spin chain Dzyaloshinsky-Moriya interaction

Received: 02 November 2010
Revised: 31 May 2011
Accepted manuscript online:

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

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11075013 and 10974016).

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Zhang Jian(张剑), Shao Bin(邵彬), Zou Jian(邹健), and Li Qian-Shu(李前树) Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction 2011 Chin. Phys. B 20 100307

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Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

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