Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 41: Poster Session IIIa
A 41.6: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Orangerie
Topological properties of interacting fermions in circularly shaken hexagonal optical lattices — •Tao Qin1, André Eckardt2, Alexander Schnell2, Christof Weitenberg3,4, Klaus Sengstock3,4,5, and Walter Hofstetter1 — 1Institut für Theoretische Physik, Goethe-Universität Frankfurt, Germany — 2Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany — 3Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany — 4The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany — 5Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
Circularly shaken hexagonal optical lattices are a versatile platform to realize the Haldane model and study related topological properties. Two groups have realized the Haldane model experimentally with slightly different set-ups [1]. Using real-space Floquet dynamical mean field theory (DMFT) we study edge states and Laughlin charge pumping of fermions with the Falicov-Kimball type interaction in a cylinder structure of the hexagonal optical lattice, and their dependence on dissipation induced by an extra bath. We find that dissipation tends to smear out edge states and induce non-integer charge pumping for a system with high frequency circular shaking. Furthermore, we explore the possibility to restore integer charge pumping at low frequency driving or by introducing disorder.
[1] G. Jotzu et al., Nature 515, 237(2014); N. Fläschner et al., Science 352, 1091(2016)