Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum gases: Lattices I

Q 49.6: Talk

Thursday, March 20, 2014, 17:45–18:00, UDL HS2002

Topological transitions of interacting bosons in one-dimensional bi-chromatic optical lattices — •Xiaolong Deng and Luis Santos — ITP, Uni. Hannover

Ultra-cold atoms in 1D bi-chromatic lattices constitute a surprisingly simple system for the study of topological insulators. We show that topological phase transitions constitute a general feature of bosons in 1D bi-chromatic lattices, and that these transitions may occur both as a function of the superlattice strength and due to inter-site interactions. We discuss in addition the topological character of incommensurate density wave phases in quasi-periodic lattices.