Memory effects in multipartite systems coupled by non-diagonal dephasing
mechanisms
- URL: http://arxiv.org/abs/2209.00400v1
- Date: Thu, 1 Sep 2022 12:23:46 GMT
- Title: Memory effects in multipartite systems coupled by non-diagonal dephasing
mechanisms
- Authors: Adri\'an A. Budini
- Abstract summary: Non-Markovian memory effects can be characterized in an exact analytical way.
Dissipative-entanglement-generation in this kind of dynamics can only emerge when a time-reversal symmetry is broken.
It is also found that departures from Markovianity can equivalently be represented through a statistical mixture of Markovian dephasing dynamics.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The developing of (non-Markovian) memory effects strongly depends on the
underlying system-environment dynamics. Here we study this problem in
multipartite arrangements where all subsystems are coupled to each other by
non-diagonal Markovian (Lindblad) dephasing mechanisms. Taking as system and
environment arbitrary sets of complementary subsystems it is shown that both
operational and non-operational approaches to quantum non-Markovianity can be
characterized in an exact analytical way. Similarly to previous studies about
dissipative-entanglement-generation in this kind of dynamics [Seif, Wang, and
Clerk, Phys. Rev. Lett. 128, 070402 (2022)], we found that memory effects can
only emerge when a time-reversal symmetry is broken. Nevertheless, it is also
found that departures from Markovianity can equivalently be represented through
a statistical mixture of Markovian dephasing dynamics, which does not involve
any system-environment entanglement. Specific bipartite and multipartite
dynamics exemplify the main general results.
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