The geometrical picture of mixed entangled states

Authors
Shi, MJ Du, JF Zhu, DP Ruan, TN
Citation
Mj. Shi et al., The geometrical picture of mixed entangled states, ACT PHY C E, 49(10), 2000, pp. 1912-1918
Citations number
34
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA SINICA
ISSN journal
10003290 → ACNP
Volume
49
Issue
10
Year of publication
2000
Pages
1912 - 1918
Database
ISI
SICI code
1000-3290(200010)49:10<1912:TGPOME>2.0.ZU;2-3
Abstract
The vector representation of density matrix is given in this paper. Any den sity matrix can be expanded in a real linear Hilbert space. The criteria fo r inseparability of mixed states can be expressed in the geometrical pictur e. Such expression is concise and perceptible. The neighborhood of the maxi mal mixed state is analyzed and a stronger result about the volume measure of the neighborhood is obtained.