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quant-ph2022★ 2 cited
Unidirectional information flow and positive divisibility are nonequivalent notions of quantum Markovianity for noninvertible dynamics
Ángel Rivas
We construct a dynamical map which is not positive divisible and does not present information backflow either (as measured by trace norm quantifiers). It is formulated for a qutrit…
cond-mat.mes-hall2022★ 1 cited
Robust nonequilibrium surface currents in the 3D Hofstadter model
Mark T. Mitchison, Ángel Rivas, Miguel A. Martin-Delgado
Genuinely two-dimensional robust crosscurrents -- which flow against the natural direction of heat flux -- have been missing since the discovery of their one-dimensional counterpar…