REMARKS ON SEPARABILITY OF COMPOUND QUANTUM-SYSTEMS AND TIME-REVERSAL

Authors
BUSCH P LAHTI PJ
Citation
P. Busch et Pj. Lahti, REMARKS ON SEPARABILITY OF COMPOUND QUANTUM-SYSTEMS AND TIME-REVERSAL, Foundations of physics letters, 10(2), 1997, pp. 113-117
Citations number
4
Categorie Soggetti
Physics
Journal title
Foundations of physics letters → ACNP
ISSN journal
08949875
Volume
10
Issue
2
Year of publication
1997
Pages
113 - 117
Database
ISI
SICI code
0894-9875(1997)10:2<113:ROSOCQ>2.0.ZU;2-7
Abstract
A separability test for density matrices of compound quantum systems p roposed recently by Peres is formulated in a manifestly basis independ ent way using antiunitary operators. We prove that the test amounts to a criterion for pure states, while it is known to fail to do so in th e case of mixed states. An interesting connection with the operation o f time reversal is thus exhibited.