Quantitative Treatment of Decoherence
Mesoscale and Nanoscale Physics
2010-10-12 v2 Statistical Mechanics
Quantum Physics
Abstract
We outline different approaches to define and quantify decoherence. We argue that a measure based on a properly defined norm of deviation of the density matrix is appropriate for quantifying decoherence in quantum registers. For a semiconductor double quantum dot qubit, evaluation of this measure is reviewed. For a general class of decoherence processes, including those occurring in semiconductor qubits, we argue that this measure is additive: It scales linearly with the number of qubits.
Cite
@article{arxiv.cond-mat/0610756,
title = {Quantitative Treatment of Decoherence},
author = {L. Fedichkin and V. Privman},
journal= {arXiv preprint arXiv:cond-mat/0610756},
year = {2010}
}
Comments
Revised version, 26 pages, in LaTeX, 3 EPS figures