Crystalline phase for one-dimensional ultra-cold atomic bosons

Details Crystalline phase for one-dimensional ultra-cold atomic bosons Crystalline phase for one-dimensional ultra-cold atomic bosons

2010-09-23

arxiv.org/abs/1009.4712v1

Physics

Condensed Matter

Quantum Gases

4 pages, 2 figures

Scientific paper

We study cold atomic gases with a contact interaction and confined into one-dimension. Crossing the confinement induced resonance the correlation between the bosons increases, and introduces an effective range for the interaction potential. Using the mapping onto the sine-Gordon model and a Hubbard model in the strongly interacting regime allows us to derive the phase diagram in the presence of an optical lattice. We demonstrate the appearance of a phase transition from a Luttinger liquid with algebraic correlations into a crystalline phase with a particle on every second lattice site.

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