Advances in Mathematical Physics
Volume 2010 (2010), Article ID 365653, 10 pages
doi:10.1155/2010/365653
Research Article

Quantum Computing in Decoherence-Free Subspace Constructed by Triangulation

Qiao Bi,1,2 Liu Guo,1 and H. E. Ruda2

1Department of Physics, School of Science, Wuhan University of Technology, Wuhan 430070, China
2Centre for Advanced Nanotechnology, University of Toronto, Toronto, M5S 3E4, Canada

Received 17 August 2009; Revised 2 November 2009; Accepted 30 December 2009

Academic Editor: Nai-Huan Jing

Copyright © 2010 Qiao Bi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A formalism for quantum computing in decoherence-free subspaces is presented. The constructed subspaces are partial triangulated to an index related to environment. The quantum states in the subspaces are just projected states which are ruled by a subdynamic kinetic equation. These projected states can be used to perform ideal quantum logical operations without decoherence.