Séminaire Maths-Physique
Effective models of the Bose polaron
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Europe/Paris
Salle K. Johnson - 1R3
Salle K. Johnson - 1R3
Description
The Bose polaron is a system in which few impurities are immersed in a cold gas of bosonic atoms. It is of interest in both mathematics and physics as a model problem where approaches to more general polaron systems in condensed matter can be tested, experimentally or by rigorous analysis.
The Bogoliubov-Fröhlich Hamiltonian provides a description of the Bose polaron by impurities interacting with a field of excitation quasi-particles.
I will discuss its derivation as an effective Hamiltonian from many-body quantum mechanics in the mean-field (high density, weakly interacting) regime (joint work with Peter Pickl). I will also mention some work in progress on extensions to dilute gases (joint work with Arnaud Triay).
The Bogoliubov-Fröhlich Hamiltonian provides a description of the Bose polaron by impurities interacting with a field of excitation quasi-particles.
I will discuss its derivation as an effective Hamiltonian from many-body quantum mechanics in the mean-field (high density, weakly interacting) regime (joint work with Peter Pickl). I will also mention some work in progress on extensions to dilute gases (joint work with Arnaud Triay).