Factoring the unitary evolution operator and quantifying entanglement

Authors
Yi, XX Sun, CP
Citation
Xx. Yi et Cp. Sun, Factoring the unitary evolution operator and quantifying entanglement, PHYS LETT A, 262(4-5), 1999, pp. 287-295
Citations number
19
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
03759601 → ACNP
Volume
262
Issue
4-5
Year of publication
1999
Pages
287 - 295
Database
ISI
SICI code
0375-9601(19991108)262:4-5<287:FTUEOA>2.0.ZU;2-T
Abstract
The unitary evolution can be represented by a finite product of exponential operators. It leads to a perturbative expression of the density operator o f a close system. Based on the perturbative expression scheme, we present a n entanglement measure. This measure has the advantage that it is easy to c ompute for a general dynamical process. (C) 1999 Published by Elsevier Scie nce B.V. All rights reserved.