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Direct estimation of functionals of density operators by local operations and classical communication

Abstract:
We present a method of determining important properties of a shared bipartite quantum state, within the ``distant labs'' paradigm, using \emph{only} local operations and classical communication (LOCC). We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.68.032306

Authors


Horodecki, P More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Mathematical Inst
Journal:
PHYSICAL REVIEW A
Volume:
68
Issue:
3
Publication date:
2003-04-18
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:75b414dd-3c8a-422a-a29e-0e24bf61628b
Source identifiers:
9901
Local pid:
pubs:9901
Language:
English
Keywords:

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