Complete positivity, Markovianity, and the quantum data-processing inequality, in the presence of initial system-environment correlations

We show that complete positivity is not only sufficient but also necessary for the validity of the quantum data-processing inequality. As a consequence, the reduced dynamics of a quantum system are completely positive, even in the presence of initial correlations with its surrounding environment, if...

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Bibliographic Details
Published in:Physical review letters, Vol. 113, No. 14 (2014), p. 140502
Main Author: Buscemi, Francesco (Author)
Format: electronic Article
Item Description:Date Completed 11.05.2015
Date Revised 18.10.2014
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
Copyright: From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Physical Description:Online-Ressource
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