Weakly interacting Bose gas in a random environment
| dc.creator | Falco, G. M. | |
| dc.creator | Nattermann, T. | |
| dc.creator | Pokrovsky, Valery L. | |
| dc.date.accessioned | 2012-09-19T20:05:45Z | |
| dc.date.available | 2012-09-19T20:05:45Z | |
| dc.date.issued | 2009 | |
| dc.description | Journals published by the American Physical Society can be found at http://journals.aps.org/ | en |
| dc.description.abstract | The localization-disorder paradigm is analyzed for a specific system of weakly repulsive Bose gas at zero temperature placed into a quenched random potential. We show that at low average density or weak enough interaction the particles fill deep potential wells of the random potential whose radius and depth depend on the characteristics of the random potential and the interacting gas. The localized state is the random singlet with no long-range phase correlation. At a critical density the quantum phase transition to the coherent superfluid state proceeds. We calculate the critical density in terms of the geometrical characteristics of the noise and the gas. In a finite system the ground state becomes nonergodic at very low density. For atoms in traps four different regimes are found; only one of it is superfluid. The theory is extended to lower (one and two) dimensions. Its quantitative predictions can be checked in experiments with ultracold atomic gases and other Bose systems. | en |
| dc.identifier.citation | G. M. Falco, T. Nattermann and Valery L. Pokrovsky. Phys.Rev.B 80 104515 2009."Copyright (2009) by the American Physical Society." | en |
| dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevB.80.104515 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/146829 | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.rights | This work is archived in the Texas A&M Digital Repository with the express permission of the rights holder (commonly but not always the publisher). A copy of the permission document is on file with the Texas A&M University Libraries. | en |
| dc.subject | SUPERFLUID-INSULATOR TRANSITION | en |
| dc.subject | DIMENSIONAL QUANTUM FLUIDS | en |
| dc.subject | EINSTEIN | en |
| dc.subject | CONDENSATION | en |
| dc.subject | ANDERSON LOCALIZATION | en |
| dc.subject | CRITICAL-BEHAVIOR | en |
| dc.subject | LIFSHITZ TAIL | en |
| dc.subject | DIRTY BOSONS | en |
| dc.subject | RANDOM-FIELD | en |
| dc.subject | DISORDER | en |
| dc.subject | DENSITY | en |
| dc.subject | Physics | en |
| dc.title | Weakly interacting Bose gas in a random environment | en |
| dc.type | Article | en |
| local.department | Physics and Astronomy | en |