Eur. Phys. J. D 50, 193-199 (2008)
https://doi.org/10.1140/epjd/e2008-00206-0

Explicit designs of spin chains for perfect quantum state transfer

¹ Department of Applied Mathematics and Physics, Xi'an Institute of Posts and Telecommunications, Xi'an, 710061, P.R. China
² Department of Physics and Centre of Computational Science and Engineering, National University of Singapore, Singapore, 117542, Singapore
³ Institute of Modern Physics, Northwest University, Xi'an, 710069, P.R. China
⁴ Department of Physics, Ningbo University, Ningbo, 315211, P.R. China
⁵ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, P.R. China

Corresponding author: ^a xxq@xiyou.edu.cn

Received: 28 July 2008
Published online: 24 October 2008

Abstract

Simple and explicit designs of short isotropic “XY" spin chains for perfect quantum state transfer are obtained analytically. Detailed results indicate that many qualitatively different designs exist, thus establishing more flexibility in designing quantum channels for high-fidelity quantum information transfer.