Unitary equilibrations: Probability distribution of the Loschmidt echo
Unitary equilibrations: Probability distribution of the Loschmidt echo
Closed quantum systems evolve unitarily and therefore cannot converge in a strong sense to an equilibrium state starting out from a generic pure state. Nevertheless for large system size one observes temporal typicality. Namely, for the overwhelming majority of the time instants, the statistics of observables is practically indistinguishable from …