Factoring the unitary evolution operator and quantifying entanglement
Quantum Physics
2009-11-06 v1
Abstract
The unitary evolution can be represented by a finite product of exponential operators. It leads to a perturbative expression of the density operator of a close system. Based on the perturbative expression scheme, we present a entanglement measure, this measure has the advantage that it is easy to compute for a general dynamical process.
Cite
@article{arxiv.quant-ph/0003024,
title = {Factoring the unitary evolution operator and quantifying entanglement},
author = {X. X. Yi and C. P. Sun},
journal= {arXiv preprint arXiv:quant-ph/0003024},
year = {2009}
}
Comments
11 pages, LATEX, no figures