Friction and diffusion of matter-wave bright solitons

Details Friction and diffusion of matter-wave bright solitons Friction and diffusion of matter-wave bright solitons

2005-06-02

arxiv.org/abs/cond-mat/0506060v2

Phys. Rev. Lett. 96, 030406 (2006)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.96.030406

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 but small 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.

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