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Q: Fachverband Quantenoptik und Photonik

Q 18: Quantum gases: Mixtures, spinor gases, disorder effects

Q 18.7: Vortrag

Montag, 18. März 2013, 18:00–18:15, E 001

polar bosons in 1D disordered optical lattices — •Xiaolong Deng¹, Roberta Citro², Edmond Orignac³, Anna Minguzzi⁴, and Luis Santos¹ — ¹ITP, Universitaet Hannover, Germany — ²Department of Physics, University Salerno, Italy — ³LPMMC, CNRS, Grenoble, France — ⁴ENS, Lyon, France

The effects of disorder and quasi-disorder on the ground-state properties of ultra-cold polar bosons in optical lattices are very interesting. In this talk, we show the rich phase diagrams from the interplay between (quasi-)disorder and inter-site interactions. A uniform disorder leads to a Haldane-insulator phase with finite parity order, whereas the density-wave phase becomes a Bose-glass at very weak disorder. For quasi-disorder, the Haldane insulator connects with a gapped generalized incommesurate density wave without an intermediate critical region. In addition, a novel kind of topological phase in the model will be discussed.