Off-diagonal long-range order in a harmonically confined two-dimensional Bose gas
| dc.creator | van Zyl, Brandon P. | |
| dc.date | 2002-04-02 | |
| dc.date | 2002-04-05 | |
| dc.date.accessioned | 2026-07-07T02:44:53Z | |
| dc.date.available | 2026-07-07T02:44:53Z | |
| dc.description | We investigate the presence of off-diagonal long-range order in a harmonically confined two-dimensional Bose gas. In the noninteracting case, an analytical calculation of the the finite-temperature one-particle density martix provides an exact description of the spatial correlations known to be associated with the existence of a Bose-Einstein condensate below the transition temperature $T^{(0)}_c$. We treat the effects of repulsive interactions within the semiclassical Hartree-Fock-Bogliubov approximation and find that even though the system remains in the same {\em uncondensed phase} for all $T \geq 0$, there appears to be a revival of off-diagonal long-range order for temperatures $T < T^{(0)}_c$. We suggest that this reentrant order is related to a phase transition in the system which {\em is not} the BEC state. | |
| dc.description | figures embedded in text, typos corrected | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0204060 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0204060 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/19114 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Off-diagonal long-range order in a harmonically confined two-dimensional Bose gas | |
| dc.type | text |