1203.0505 (Xiaolong Deng et al.)

Polar bosons in one-dimensional disordered optical lattices    [PDF]

Xiaolong Deng, Roberta Citro, Edmond Orignac, Anna Minguzzi, Luis Santos

We analyze the effects of disorder and quasi-disorder on the ground-state properties of ultra-cold polar bosons in optical lattices. We show that the interplay between disorder and inter-site interactions leads to rich phase diagrams. 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.

View original: http://arxiv.org/abs/1203.0505