Fluctuating and dissipative dynamics of dark solitons in quasicondensates
| dc.contributor.author | Cockburn, S. P. | en |
| dc.contributor.author | Nistazakis, H. E. | en |
| dc.contributor.author | Horikis, T. P. | en |
| dc.contributor.author | Kevrekidis, P. G. | en |
| dc.contributor.author | Proukakis, N. P. | en |
| dc.contributor.author | Frantzeskakis, D. J. | en |
| dc.date.accessioned | 2015-11-24T17:24:07Z | |
| dc.date.available | 2015-11-24T17:24:07Z | |
| dc.identifier.issn | 1050-2947 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/12848 | |
| dc.rights | Default Licence | - |
| dc.subject | bose-einstein condensate | en |
| dc.subject | gross-pitaevskii equation | en |
| dc.subject | motion | en |
| dc.subject | gases | en |
| dc.subject | mechanics | en |
| dc.title | Fluctuating and dissipative dynamics of dark solitons in quasicondensates | en |
| heal.abstract | The fluctuating and dissipative dynamics of matter-wave dark solitons within harmonically trapped, partially condensed Bose gases is studied both numerically and analytically. A study of the stochastic Gross-Pitaevskii equation, which correctly accounts for density and phase fluctuations at finite temperatures, reveals dark-soliton decay times to be lognormally distributed at each temperature, thereby characterizing the previously predicted long-lived soliton trajectories within each ensemble of numerical realizations [ S. P. Cockburn et al., Phys. Rev. Lett. 104, 174101 (2010)]. Expectation values for the average soliton lifetimes extracted from these distributions are found to agree well with both numerical and analytic predictions based upon the dissipative Gross-Pitaevskii model (with the same ab initio damping). Probing the regime for which 0.8 k(B)T < mu < 1.6 k(B)T, we find average soliton lifetimes to scale with temperature as tau similar to T(-4), in agreement with predictions previously made for the low-temperature regime k(B)T << mu. The model is also shown to capture the experimentally relevant decrease in the visibility of an oscillating soliton due to the presence of background fluctuations. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1103/Physreva.84.043640 | - |
| heal.identifier.secondary | <Go to ISI>://000296284300007 | - |
| heal.identifier.secondary | http://pra.aps.org/pdf/PRA/v84/i4/e043640 | - |
| heal.journalName | Physical Review A | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2011 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μαθηματικών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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