Friction and diffusion of matter-wave bright solitons

We consider the motion of a matter-wave bright soliton under the influence of a cloud of thermal particles. In the ideal one-dimensional system, the scattering process of the quasiparticles with the soliton is reflectionless; however, the quasiparticles acquire a phase shift. In the realistic system...

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Bibliographic Details
Published in:Physical review letters 2006-01, Vol.96 (3), p.030406-030406, Article 030406
Main Authors: Sinha, Subhasis, Cherny, Alexander Yu, Kovrizhin, Dmitry, Brand, Joachim
Format: Article
Language:English
Subjects:
BOSE-EINSTEIN CONDENSATION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DEGREES OF FREEDOM
DIFFUSION
FRICTION
MATTER
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
PHASE SHIFT
REFLECTION
SCATTERING
SOLITONS
TEMPERATURE DEPENDENCE
WAVEGUIDES
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Summary:We consider the motion of a matter-wave bright soliton under the influence of a cloud of thermal particles. In the ideal one-dimensional system, the scattering process of the quasiparticles with the soliton is reflectionless; however, the quasiparticles acquire a phase shift. In the realistic system of a Bose-Einstein condensate confined in a tight waveguide trap, the transverse degrees of freedom generate an extra nonlinearity in the system which gives rise to finite reflection and leads to dissipative motion of the soliton. We calculate the velocity and temperature-dependent frictional force and diffusion coefficient of a matter-wave bright soliton immersed in a thermal cloud.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.96.030406