Dynamics of dark–bright solitons in cigar-shaped Bose–Einstein condensates

S Middelkamp; J.J Chang; C Hamner; R Carretero-González; P.G Kevrekidis; V Achilleos; D.J Frantzeskakis; P Schmelcher; P Engels

doi:10.1016/j.physleta.2010.11.025

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Dynamics of dark–bright solitons in cigar-shaped Bose–Einstein condensates

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Dynamics of dark–bright solitons in cigar-shaped Bose–Einstein condensates

S Middelkamp, J.J Chang, C Hamner, R Carretero-González, P.G Kevrekidis, V Achilleos, D.J Frantzeskakis, P Schmelcher and P Engels

Physics letters. A, Vol.375(3), pp.642-646

01/17/2011

DOI: https://doi.org/10.1016/j.physleta.2010.11.025

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https://hdl.handle.net/2376/115270

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Abstract

Bose–Einstein condensation

Solitons

We explore the stability and dynamics of dark–bright (DB) solitons in two-component elongated Bose–Einstein condensates by developing effective one-dimensional vector equations and solving the three-dimensional Gross–Pitaevskii equations. A strong dependence of the oscillation frequency and of the stability of the DB soliton on the atom number of its components is found; importantly, the wave may become dynamically unstable even in the 1D regime. As the atom number in the dark-soliton-supporting component is further increased, spontaneous symmetry breaking leads to oscillatory dynamics in the transverse degrees of freedom. Moreover, the interactions of two DB solitons are investigated with an emphasis on the importance of their relative phases. Experimental results showcasing multiple DB soliton oscillations and a DB–DB collision in a Bose–Einstein condensate consisting of two hyperfine states of 87Rb confined in an elongated optical dipole trap are presented.

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Title: Dynamics of dark–bright solitons in cigar-shaped Bose–Einstein condensates
Creators: S Middelkamp - Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
J.J Chang - Washington State University, Department of Physics & Astronomy, Pullman, WA 99164, USA
C Hamner - Washington State University, Department of Physics & Astronomy, Pullman, WA 99164, USA
R Carretero-González - Nonlinear Physics Group, Escuela Técnica Superior de Ingeniería Informática, Departamento de Física Aplicada I, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
P.G Kevrekidis - Department of Mathematics and Statistics, University of Massachusetts, Amherst, MA 01003-4515, USA
V Achilleos - Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 157 84, Greece
D.J Frantzeskakis - Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 157 84, Greece
P Schmelcher - Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
P Engels - Washington State University, Department of Physics & Astronomy, Pullman, WA 99164, USA
Publication Details: Physics letters. A, Vol.375(3), pp.642-646
Academic Unit: Physics and Astronomy, Department of
Publisher: Elsevier B.V
Identifiers: 99900547721901842
Language: English
Resource Type: Journal article