The Two-Dimensional Bose-Einstein Condensate
| dc.creator | Fernandez, Juan Pablo | |
| dc.creator | Mullin, William J. | |
| dc.date | 2002-03-08 | |
| dc.date | 2002-05-20 | |
| dc.date.accessioned | 2026-07-07T02:44:39Z | |
| dc.date.available | 2026-07-07T02:44:39Z | |
| dc.description | We study the Hartree-Fock-Bogoliubov mean-field theory as applied to a two-dimensional finite trapped Bose gas at low temperatures and find that, in the Hartree-Fock approximation, the system can be described either with or without the presence of a condensate; this is true in the thermodynamic limit as well. Of the two solutions, the one that includes a condensate has a lower free energy at all temperatures. However, the Hartree-Fock scheme neglects the presence of phonons within the system, and when we allow for the possibility of phonons we are unable to find condensed solutions; the uncondensed solutions, on the other hand, are valid also in the latter, more general scheme. Our results confirm that low-energy phonons destabilize the two-dimensional condensate. | |
| dc.description | 8 pages, 3 figures, REVTeX 4. To appear in J. Low Temp. Phys. Corrected a mistake in a calculation and changed the conclusions accordingly | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0203175 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0203175 | |
| dc.identifier | J. Low Temp. Phys. 128, 233 (2002) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/19010 | |
| dc.subject | Statistical Mechanics | |
| dc.title | The Two-Dimensional Bose-Einstein Condensate | |
| dc.type | text |