Quantum phases of bosons in double-well optical lattices

Details Quantum phases of bosons in double-well optical lattices Quantum phases of bosons in double-well optical lattices

2007-05-18

arxiv.org/abs/0705.2732v1

Phys. Rev. A 76, 043606 (2007)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevA.76.043606

We study the superfluid to Mott insulator transition of bosons in a two-legged ladder optical lattice, of a type accessible in current experiments on double-well optical lattices. The zero-temperature phase diagram is mapped out, with a focus on its dependence upon interchain hopping and the tilt between double wells. We find that the unit-filling Mott phase exhibits a non-monotonic behavior as a function of the tilt parameter, producing a reentrant phase transition between Mott insulator and superfluid phases.

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