S. Greschner, L. Santos, T. Vekua
Ultra-cold bosons in zig-zag optical lattices present a rich physics due to
the interplay between frustration, induced by lattice geometry, two-body
interaction and three-body constraint. Unconstrained bosons may develop chiral
superfluidity and a Mott-insulator even at vanishingly small interactions.
Bosons with a three-body constraint allow for a Haldane-insulator phase in
non-polar gases, as well as pair-superfluidity and density wave phases for
attractive interactions. These phases may be created and detected within the
current state of the art techniques.
View original:
http://arxiv.org/abs/1202.5386
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