Non-monotonic population and coherence evolution in Markovian open-system dynamics
arXiv:1903.11118 · doi:10.1007/978-3-030-31146-9_4
Abstract
We consider a simple microscopic model where the open-system dynamics of a qubit, despite being Markovian, shows features which are typically associated to the presence of memory effects. Namely, a non monotonic behavior both in the population and in the coherence evolution arises due to the presence of non-secular contributions, which break the phase covariance of the Lindbladian (semigroup) dynamics. We also show by an explicit construction how such a non-monotonic behaviour can be reproduced by a phase covariant evolution, but only at the price of inserting some state-dependent memory effects.
Submitted to the proceedings of the 684. WE-Heraeus-Seminar "Advances in open systems and fundamental tests of quantum mechanics"
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