Reentrant transition of bosons in a quasiperiodic potential

Details Reentrant transition of bosons in a quasiperiodic potential Reentrant transition of bosons in a quasiperiodic potential

2010-05-11

arxiv.org/abs/1005.1906v1

EPL 90 46001 (2010)

Physics

Condensed Matter

Quantum Gases

Accepted for publication in EPL

Scientific paper

10.1209/0295-5075/90/46001

We investigate the behavior of a two dimensional array of Bose-Einstein condensate tubes described by means of a Bose-Hubbard Hamiltonian. Using a Wannier function expansion for the wavefunction in each tube, we compute the Bose-Hubbard parameters related to two different longitudinal potentials, periodic and quasiperiodic. We predict that - upon increasing the external potential strength along the direction of the tubes - the condensate can experience a reentrant transition between a Mott insulating phase and the superfluid one.

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