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
Revised: 26 May 2009
Published online: 15 August 2009
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  and the particular ihhomogenous spin-chain channel , 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009