Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Ultracold Atoms, Ions and Molecules III (with Q)
A 14.9: Vortrag
Dienstag, 1. März 2016, 13:00–13:15, f342
Effect of lattice geometry on bosonic quantum phases of Rydberg dressed lattice gases — •Andreas Geißler1, Mathieu Barbier1, Yongqiang Li2, and Walter Hofstetter1 — 1Institut für Theoretische Physik, Goethe Universität Frankfurt am Main, Germany — 2Department of Physics, NUDT, China
Our recent reults [1] have shown the rich diversity of quantum phases which are induced by the strong correlations inherent to Rydberg dressed bosonic atoms trapped in optical lattices. While experimental feasibility of the dressing itself has just recently been demonstrated for the first time [2], a better understanding of the crystallisation is still required. We analyse Rydberg dressed lattice systems for various lattice geometries by further applying our real space dynamical mean-field theory (RB-DMFT) methods. These results serve as a benchmark of Gutzwiller type mean-field simulations where dissipative dynamics can be simulated within the Lindblad master equation approach. Within the latter approach we can observe crystallisation dynamics and the stability of crystalline structures. We additionally focus on quasiparticle excitations which we determine from linearised Gutzwiller equations.
[1] A. Geißler et al., arXiv:1509.06292, [physics.cond-mat]
[2] Y.-Y. Jau et al., Nat. Phys., nphys3487 (2015)