A Diagrammatic Monte Carlo study of the Fermi Polaron

by Dr Olga Goulko, University of Massachusetts Amherst

Monday 10 Aug 2015, 16:00 → 17:00 Europe/Berlin

Seminarraum 4 (Jungiusstr. 9)

The Fermi polaron is a single fermionic impurity interacting with a sea of fermions with a different spin. It is an exemplary system to study impurity problems, strongly imbalanced Fermi gases and quasiparticle properties. For strong interactions diagrammatic Monte Carlo provides a reliable tool to calculate various properties of the system quantitatively and from first principles. In my talk I will show how bold diagrammatic Monte Carlo, resummation techniques and analytic continuation can be applied to obtain the spectral function of the Fermi polaron, which can be measured in cold atoms experiments.