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arXiv · 0705.2732

Quantum phases of bosons in double-well optical lattices

Ippei Danshita·James E. Williams·Carlos A. R. Sa de Melo·Charles W. Clark
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Abstract

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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Ippei Danshita, James E. Williams, Carlos A. R. Sa de Melo, Charles W. Clark. 2007-05-18. Quantum phases of bosons in double-well optical lattices. https://doi.org/10.1103/physreva.76.043606

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