Open AccessTHE GEOMETRICAL PICTURE OF MIXED ENTANGLED STATES
Author(s) -
Minxian Shi,
Jiangfeng Du,
Dan Zhu,
RUAN TU-NAN
Publication year - 2000
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.49.1912
Subject(s) - measure (data warehouse) , hilbert space , density matrix , representation (politics) , matrix (chemical analysis) , space (punctuation) , computer science , pure mathematics , physics , quantum mechanics , mathematics , quantum , materials science , data mining , politics , political science , law , composite material , operating system
The vector representation of density matrix is given in this paper. Any density matrix can be expanded in a real linear Hilbert space. The criteria for insepara bility of mixed states can be expressed in the geometrical picture. Such express ion is concise and perceptible. The neighborhood of the maximal mixed state is analyzed and a stronger result about the volume measure of the neighborhood is obtained.