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Open AccessFeature PaperArticle

Quasi-Entropies and Non-Markovianity

by Fabio Benatti 1,2,* and Luigi Brancati 1
Department of Physics, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy
Istituto Nazionale di Fisica Nucleare (INFN), I-34151 Trieste, Italy
Author to whom correspondence should be addressed.
Entropy 2019, 21(10), 1020;
Received: 10 September 2019 / Revised: 16 October 2019 / Accepted: 18 October 2019 / Published: 21 October 2019
(This article belongs to the Special Issue Quantum Entropies and Complexity)
We address an informational puzzle that appears with a non-Markovian open qubit dynamics: namely the fact that, while, according to the existing witnesses of information flows, a single qubit affected by that dissipative dynamics does not show information returning to it from its environment, instead two qubits do show such information when evolving independently under the same dynamics. We solve the puzzle by adding the so-called quasi-entropies to the possible witnesses of information flows. View Full-Text
Keywords: non-markovian quantum dynamics; dynamical monotones; quasi-entropies non-markovian quantum dynamics; dynamical monotones; quasi-entropies
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Benatti, F.; Brancati, L. Quasi-Entropies and Non-Markovianity. Entropy 2019, 21, 1020.

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