Séminaire de Daniel Finkelstein-Shapiro, en mode HYBRIDE

60 years of Fano Interferences

par Daniel Finkelstein-Shapiro

Universidad Nacional Autónoma de México (UNAM)

The Fano model and its distinctive asymmetric lineshape have enjoyed tremendous success in explaining spectra in a number of areas ranging from atomic physics to mesoscopic systems. It arises from the interference between two excitation pathways in a two-level system coupled to a continuum and is one of the most important toy models in spectroscopy. In condensed phase systems, unlike atomic ones, the nuclear motion modulates the excited state evolution by opening dissipative pathways back to the ground state, and the model needs to be expanded to account for this. In this talk, I present a (mostly) theoretical overview of the progressive introduction of dissipation into Fano models, its implication for the dynamics and a few example applications in spectroscopy. I discuss as well the methods available for reconstructing the density matrix in continuous manifolds and conclude with some mathematical properties of effective operators derived from Fano models that have broader implications in open quantum systems.

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http://www.ismo.universite-paris-saclay.fr/spip.php?article2736