Mixing-induced quantum non-Markovianity and information flow

Mixing dynamical maps describing open quantum systems can lead from Markovian to non-Markovian processes. Being surprising and counter-intuitive, this result has been used as argument against characterization of non-Markovianity in terms of information exchange. Here, we demonstrate that, quite the...

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Bibliographic Details
Published in:New journal of physics 2018-04, Vol.20 (4), p.43007
Main Authors: Breuer, Heinz-Peter, Amato, Giulio, Vacchini, Bassano
Format: Article
Language:English
Subjects:
distinguishability of quantum states
Flow mapping
Information flow
mixing quantum dynamical maps
non-Markovian quantum dynamics
open quantum systems
Physics
system-environment correlations
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Summary:Mixing dynamical maps describing open quantum systems can lead from Markovian to non-Markovian processes. Being surprising and counter-intuitive, this result has been used as argument against characterization of non-Markovianity in terms of information exchange. Here, we demonstrate that, quite the contrary, mixing can be understood in a natural way which is fully consistent with existing theories of memory effects. In particular, we show how mixing-induced non-Markovianity can be interpreted in terms of the distinguishability of quantum states, system-environment correlations and the information flow between system and environment.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/aab2f9