Measures of Decoherence
Mesoscale and Nanoscale Physics
2010-10-12 v2 Materials Science
Statistical Mechanics
Strongly Correlated Electrons
Superconductivity
Quantum Physics
Abstract
Methods for quantifying environmentally induced decoherence in quantum systems are investigated. We formulate criteria for measuring the degree of decoherence and consider several representative examples, including a spin interacting with the modes of a bosonic, e.g., phonon, bath. We formulate an approach based on the operator norm measuring the deviation of the actual density matrix from the ideal one which would describe the system without environmental interactions.
Cite
@article{arxiv.cond-mat/0303158,
title = {Measures of Decoherence},
author = {Leonid Fedichkin and Arkady Fedorov and Vladimir Privman},
journal= {arXiv preprint arXiv:cond-mat/0303158},
year = {2010}
}