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Vanishing quantum discord is not necessary for completely positive maps

Abstract:

The description of the dynamics of a system that may be correlated with its environment is only meaningful within the context of a specific framework. Different frameworks rely upon different assumptions about the initial system-environment state. We reexamine the connections between complete positivity and quantum discord within two different sets of assumptions about the relevant family of initial states. We present an example of a system-environment state with nonvanishing quantum discord ...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevA.87.042301

Authors


Brodutch, A More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
Rodriguez-Rosario, CA More by this author
Journal:
PHYSICAL REVIEW A
Volume:
87
Issue:
4
Publication date:
2013-04-01
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
URN:
uuid:76f834e0-c159-4834-9a4a-f80d239c814a
Source identifiers:
405966
Local pid:
pubs:405966
Language:
English

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