Eur. Phys. J. D 55, 211-221 (2009)
https://doi.org/10.1140/epjd/e2009-00232-4

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

Department of modern physics, University of Science and Technology of China, Hefei, 230026, P.R. China

Corresponding authors: ^a dxkong@mail.ustc.edu.cn - ^b anmwang@ustc.edu.cn

Received: 19 March 2009
Revised: 26 May 2009
Published online: 15 August 2009

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.