Bosonic mixtures in two dimensions (Volker Karle)
- Datum: 24.05.2018
- Uhrzeit: 11:00 - 12:00
- Vortragende(r): Volker Karle
- Institut für Theoretische Physik an der Ruprecht-Karls-Universität Heidelberg, visiting MPQ from 23.05.2018 to 25.05.2018
- Ort: Max-Planck-Institut für Quantenoptik
- Raum: B 0.40
- Gastgeber: MPQ, Theory Division, hosted by Dr. Richard Schmidt
In this talk a two-component bosonic gas in two dimensions at low temperatures with zero-range repulsive interaction is considered. In our work we focus on the coexistence phase with superfluid behavior in both components, where a new phenomenon appears: The non-dissipative drag, also called Andreev-Bashkin effect, as a result of the interbosonic interactions, which leads to a modification of the usual BKT-transition. Quantum fluctuations of the elementary excitations lead to further corrections of the phase boundary. We study the renormalization of the densities at finite temperatures using standard RG-methods.