Regensburg 2013 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 9: Quantum Liquids, Miscellaneous 1

TT 9.1: Talk

Monday, March 11, 2013, 09:30–09:45, H21

Effective interactions and renormalized Bose surface in the normal state of the two-dimensional Bose gas with Rashba spin-orbit coupling — •Casper Drukier, Kira Riedl, and Peter Kopietz — Institut für Theoretische Physik, J.W.Goethe-Universität Frankfurt, Frankfurt am Main, Germany

The non-interacting energy-dispersion of a two-dimensional system of bosons with Rashba spin-orbit coupling exhibits a continuum of degenerate minima on a circle in momentum space, which is the bosonic analogue of a Fermi surface. Recent theoretical studies [1,2] suggest that this degeneracy is broken by interactions. Using second order perturbation theory for the self-energy, we calculate the renormalization of the Bose surface as well as the damping of the bosonic quasiparticles. We finally discuss different condensation scenarios.
[1] Phys. Rev. A 84, 061604(R) (2011)
Phys. Rev. Lett. 105, 160403 (2010)