Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 69: Other Low Temperature Topics: Cold Atomic Gases
TT 69.13: Vortrag
Mittwoch, 18. März 2015, 18:15–18:30, A 053
B-DMFT with strong-coupling solver for inhomogeneous systems — Anna Kauch1, •Jaromir Panas2, Dieter Vollhardt3, and Krzysztof Byczuk2 — 1Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 18221 Praha, Czech Republic — 2Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warszawa, Poland — 3Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
We employ bosonic dynamical mean-field theory (B-DMFT) [1] with a strong-coupling impurity solver [2] to compute the particle density and condensate fraction of strongly interacting, inhomogeneous Bose systems. We apply the method to bosons in optical lattices with inhomogeneities due to the trapping potential and impurities. The influence of these inhomogeneities on the transition between the Mott insulating phase and the Bose-Einstein condensate is discussed.
[1] K. Byczuk and D. Vollhardt, Phys. Rev. B 77, 235106 (2008).
[2] A. Kauch, K. Byczuk, and D. Vollhardt,
Phys. Rev. B 85, 205115 (2012).