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Crossover dark soliton dynamics in ultracold one-dimensional Bose gases

Lookup NU author(s): Professor Nikolaos Proukakis

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Abstract

Ultracold confined one-dimensional atomic gases are predicted to support dark soliton solutions arising from a nonlinear Schrödinger equation of suitable nonlinearity. In weakly-interacting (high density) gases, the nonlinearity is cubic, whereas an approximate model for describing the behavior of strongly-interacting (low density) gases is one characterized by a quintic nonlinearity. We use an approximate analytical expression for the form of the nonlinearity in the intermediate regimes to show that, near the crossover between the two different regimes, the soliton is predicted and numerically confirmed to oscillate at a frequency of sqrt(2 / 3) Ω, where Ω is the harmonic trap frequency. © 2006 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Frantzeskakis DJ, Kevrekidis PG, Proukakis NP

Publication type: Article

Publication status: Published

Journal: Physics Letters, Section A: General, Atomic and Solid State Physics

Year: 2007

Volume: 364

Issue: 2

Pages: 129-134

ISSN (print): 0375-9601

ISSN (electronic): 1873-2429

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.physleta.2006.11.074

DOI: 10.1016/j.physleta.2006.11.074


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