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Quasi-Entropies and Non-Markovianity
Fabio Benatti (University of Trieste, Istituto Nazionale di Fisica Nucleare), Luigi Brancati (University of Trieste)
Résumé : 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.