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Spectral properties modeling closed and open quantum dynamics, information flow and environmental energy

23/05/2017 dalle 14:30 alle 15:30

Dove Sala riunioni, piano 1, via Irnerio, 46, Bologna

Contatto di riferimento

Partecipanti PhD Filippo Giraldi: University of KwaZulu-Natal, DURBAN (South Africa)

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ABSTRACT

Spectral properties determine relevant features in the time evolution of open and closed quantum systems. In local dephasing channels, for ohmic-like spectral densities, patterns appear in the flow of quantum information for periodic values of the ohmicity parameter.

For specially correlated initial conditions, the long-time variations of the environmental energy follow, in the super-ohmic regime, the flow of quantum infomation.

For unstable quantum states, if the energy distribution density exhibits appropriate removable logarithmic singularities in the minimum energy of the spectrum, the instantaneous energy and the survival amplitude show logarithmic-like relaxations that are arbitrarily slower or faster than inverse power laws.