Title: Free dynamics of a tracer particle in a Fermi sea

Date: 01/19/2017

Time: 11:00 AM - 11:50 AM

Place: C304 Wells Hall

Speaker: Soeren Petrat, IAS and Princeton

The talk is about the dynamics of a tracer particle coupled strongly to a dense non-interacting electron gas in one or two dimensions. I will present a recent result that shows that for high densities the tracer particle moves freely for very long times, i.e., the electron gas becomes transparent. However, the correct phase factor is non-trivial. To leading order, it is given by mean-field theory, but one also has to include a correction coming from immediate recollision diagrams.