How Far do Lindbladians Go?

Abstract: We investigate geometric aspects of the space of densities by analyzing transport along paths generated by quantum Markovian semigroups and more generally locally Markovian, or time-dependent Lindbladian, dynamics. Motivated by practical constraints, we also consider a more realistic scenario in which only a restricted set of Lindbladian generators is available. We study the corresponding transitivity properties and characterize the set of states that can be reached using such limited dynamical resources.