| Issue |
EPL
Volume 90, Number 4, May 2010
|
|
|---|---|---|
| Article Number | 46001 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/90/46001 | |
| Published online | 04 June 2010 | |
Re-entrant transition of bosons in a quasiperiodic potential
Department of Physics, Umeå University - SE-90187 Umeå, Sweden, EU
Corresponding author: alberto.cetoli@tp.umu.se
Received:
29
March
2010
Accepted:
4
May
2010
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 wave function 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 system can experience a re-entrant transition between a Mott insulating phase and the superfluid one.
PACS: 64.70.Tg – Quantum phase transitions / 03.75.Lm – Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices and topological excitations
© EPLA, 2010
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