Quantum-state transfer on spin-chain channels with random imperfections

Quantum Information

Abstract

We investigate the quantum-state transfer on spin-chain channels with random imperfections. Through combining the advantages of two known schemes, the dual-rail spin-chain channels [9] and the particular ihhomogenous spin-chain channel [10], we propose a protocol that can avoid the quantum noises introduced by many unnecessary measurements and can enhance the anti-decoherence ability. The results show that our protocol is more efficient to transfer an arbitrary quantum state than the original one. In particular, we discuss the effects of couplings fluctuations and imperfect initialization on both of the improved scheme and original one.

PACS

03.67.Hk Quantum communication 05.50.+q Lattice theory and statistics 05.60.Gg Quantum transport 73.21.Hb Quantum wires 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of modern physicsUniversity of Science and Technology of ChinaHefeiP.R. China

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