Fragmented superfluid due to frustration of cold atoms in optical lattices

Details Fragmented superfluid due to frustration of cold atoms in optical lattices Fragmented superfluid due to frustration of cold atoms in optical lattices

2006-04-06

arxiv.org/abs/cond-mat/0604164v3

New Journal of Physics 9, 139 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

New version, more results, about 20 pages

Scientific paper

10.1088/1367-2630/9/5/139

A one dimensional optical lattice is considered where a second dimension is encoded in the internal states of the atoms giving effective ladder systems. Frustration is introduced by an additional optical lattice that induces tunneling of superposed atomic states. The effects of frustration range from the stabilization of the Mott insulator phase with ferromagnetic order, to the breakdown of superfluidity and the formation of a macroscopically fragmented phase.

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