Local description of quantum inseparability

Sanpera, Anna, Tarrach, Rolf and Vidal, Guifre (1998) Local description of quantum inseparability. Physical Review a, 58 2: 826-830. doi:10.1103/PhysRevA.58.826

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Author Sanpera, Anna
Tarrach, Rolf
Vidal, Guifre
Title Local description of quantum inseparability
Journal name Physical Review a   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 1998-08-01
Sub-type Article (original research)
DOI 10.1103/PhysRevA.58.826
Open Access Status File (Publisher version)
Volume 58
Issue 2
Start page 826
End page 830
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
We show how to decompose any density matrix of the simplest binary composite systems, whether separable or not, in terms of only product vectors. We determine for all cases the minimal number of product vectors needed for such a decomposition. Separable states correspond to mixing from one to four pure product states. Inseparable states can be described as pseudomixtures of four or five pure product states, and can be made separable by mixing them with one or two pure product states.
Keyword States
Separability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Engineering Publications
 
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