%0 Journal Article
%T Non-Markovianity and memory of the initial state
%A Hinarejos, M.
%A Bañuls, M. C.
%A Perez, A.
%A de Vega, I.
%J Journal of Physics A
%D 2017
%V 50
%N 32
%I Iop Publishing Ltd
%@ 1751-8113
%G English
%F Hinarejos_etal2017
%O WOS:000405672800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3206), last updated on Wed, 20 Nov 2019 16:19:38 +0000
%X We explore in a rigorous manner the intuitive connection between the non-Markovianity of the evolution of an open quantum system and the performance of the system as a quantum memory. Using the paradigmatic case of a two-level open quantum system coupled to a bosonic bath, we compute the recovery fidelity, which measures the best possible performance of the system to store a qubit of information. We deduce that this quantity is connected, but not uniquely determined, by the non-Markovianity, for which we adopt the Breuer-Laine-Piilo measure proposed in Breuer et al (2009 Phys. Rev. Lett. 103 210401). We illustrate our findings with explicit calculations for the case of a structured environment.
%K non-Markovianity
%K quantum distinguisability
%K quantum fidelity
%R 10.1088/1751-8121/aa7972
%U http://arxiv.org/abs/1606.01185
%U https://doi.org/10.1088/1751-8121/aa7972
%P 335301 - 17pp