Noiseless subsystems and the structure of the commutant in quantum error correction
Quantum Physics
2007-05-23 v1 Operator Algebras
Abstract
The effect of noise on a quantum system can be described by a set of operators obtained from the interaction Hamiltonian. Recently it has been shown that generalized quantum error correcting codes can be derived by studying the algebra of this set of operators. This led to the discovery of noiseless subsystems. They are described by a set of operators obtained from the commutant of the noise generators. In this paper we derive a general method to compute the structure of this commutant in the case of unital noise.
Cite
@article{arxiv.quant-ph/0402056,
title = {Noiseless subsystems and the structure of the commutant in quantum error correction},
author = {J. A. Holbrook and D. W. Kribs and R. Laflamme},
journal= {arXiv preprint arXiv:quant-ph/0402056},
year = {2007}
}
Comments
39 pages, Quantum Information Processing, to appear