Open Quantum Dynamics: Memory Effects and Superactivation of Backflow of Information

Fabio Benatti () and Giovanni Nichele
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Fabio Benatti: Department of Physics, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy
Giovanni Nichele: Department of Physics, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy

Mathematics, 2023, vol. 12, issue 1, 1-20

Abstract: We investigate the divisibility properties of the tensor products Λ t ( 1 ) ⊗ Λ t ( 2 ) of open quantum dynamics Λ t ( 1 , 2 ) with time-dependent generators. These dynamical maps emerge from a compound open system S 1 + S 2 that interacts with its own environment in such a way that memory effects remain when the environment is traced away. This study is motivated by the following intriguing effect: one can have Backflow of Information (BFI) from the environment to S 1 + S 2 without the same phenomenon occurring for either S 1 and S 2 . We shall refer to this effect as the Superactivation of BFI (SBFI).

Keywords: non-Markovianity; Backflow of Information; P-divisibility (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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