TY  - JOUR
AU  - Hinarejos, M.
AU  - Bañuls, M. C.
AU  - Perez, A.
AU  - de Vega, I.
PY  - 2017
DA  - 2017//
TI  - Non-Markovianity and memory of the initial state
T2  - J. Phys. A
JO  - Journal of Physics A
SP  - 335301 - 17pp
VL  - 50
IS  - 32
PB  - Iop Publishing Ltd
KW  - non-Markovianity
KW  - quantum distinguisability
KW  - quantum fidelity
AB  - 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.
SN  - 1751-8113
UR  - http://arxiv.org/abs/1606.01185
UR  - https://doi.org/10.1088/1751-8121/aa7972
DO  - 10.1088/1751-8121/aa7972
LA  - English
N1  - WOS:000405672800001
ID  - Hinarejos_etal2017
ER  -