Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 7: Cold Atomic Gases

TT 7.8: Vortrag

Montag, 7. März 2016, 12:15–12:30, H18

Study of the Bose-Hubbard model with infinite-range interaction — •Jaromir Panas¹, Anna Kauch², and Krzysztof Byczuk¹ — ¹Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warszawa, Poland — ²Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18221 Praha, Czech Republic

In relation to a recent experiment [1] we study the Bose-Hubbard model with an infinite-range interaction creating a staggered order. To this end we employ the bosonic dynamical mean-field theory (B-DMFT) [2] with a self-consistent, mean-field correction responsible for the exact treatment of an infinite-range interaction. The B-DMFT method is generalized to a system on a bipartite lattice. A self-consistent equation that includes effects of long-range ordering is presented. Comparison with experiment is achieved through a phase diagram. We find four distinct phases thus obtaining qualitative agreement with experimental results.
R. Landig, L. Hruby, N. Dogra, M. Landini, R. Mottl, T. Donner,

and T. Esslinger, arXiv:1511.00007.
K. Byczuk, and D. Vollhardt, PRB 77, 235106 (2008).