Upcoming Talks

Ist logo

Breakdown of superfluidity in binary Bose mixtures in two dimensions

Date: Tuesday, November 27, 2018 14:00 - 15:30
Speaker: Volker Karle (Heidelberg University)
Location: Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
Series: Physical Sciences Seminar
Host: Misha Lemeshko
Contact: SORONDA Marija
Lab building west seminar room


In this talk I will consider a two-component bosonic gas in two dimensions at low temperatures with a zero-range repulsive interaction.I will focus on the coexistence phase with superfluid behavior in both components, where a phenomenon appears which is not present in the one-component case: The non-dissipative drag between the two superfluid flows (Andreev-Bashkin effect), which originates from the interactions between different components. I will show that this behavior leads to a modification of the usual BKT transition in two dimensions. Ultimately, the renormalization group flow indicates that a collapse of the superfluid of one component can lead to the collapse of the superfluid of the other component and their critical temperatures are in that case equal.
Qr image
Download ICS Download invitation
Back to eventlist