Citation
R. Schack et Cm. Caves, Explicit product ensembles for separable quantum states, J MOD OPT, 47(2-3), 2000, pp. 387-399
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF MODERN OPTICS
ISSN journal
09500340
→ ACNP
Volume
47
Issue
2-3
Year of publication
2000
Pages
387 - 399
Database
ISI
SICI code
0950-0340(200002/03)47:2-3<387:EPEFSQ>2.0.ZU;2-1
Abstract
We present a general method for constructing pure-product-state representat
ions for density operators of hi quantum bits. If such a representation has
non-negative expansion coefficients, it provides an explicit separable ens
emble for the density operator. We derive the condition for separability of
a mixture of the Greenberger-Horne-Zeilinger state with the maximally mixe
d state.