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arXiv · 0712.0428

Experimentally accessible reentrant phase transitions in double-well optical lattices

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

We study the quantum phases of bosons confined in a combined potential of a one-dimensional double-well optical lattice and a parabolic trap. We apply the time-evolving block decimation method to the corresponding two-legged Bose-Hubbard model. In the absence of a parabolic trap, the system of bosons in the double-well optical lattice exhibits a reentrant quantum phase transition between Mott insulator and superfluid phases at unit filling as the tilt of the double-wells is increased. We show that the reentrant phase transition occurs also in the presence of a parabolic trap and suggest that it can be detected in experiments by measuring the matter-wave interference pattern.

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Ippei Danshita, Carlos A. R. Sa de Melo, Charles W. Clark. 2007-12-04. Experimentally accessible reentrant phase transitions in double-well optical lattices. https://arxiv.org/abs/0712.0428

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