Dynamics and kinetics of quasiparticle decay in a nearly-one-dimensional degenerate Bose gas

Details Dynamics and kinetics of quasiparticle decay in a nearly-one-dimensional degenerate Bose gas Dynamics and kinetics of quasiparticle decay in a nearly-one-dimensional degenerate Bose gas

2011-02-18

arxiv.org/abs/1102.3934v2

Phys. Rev. A 83, 043625 (2011)

Physics

Condensed Matter

Quantum Gases

Revtex4, 4 Figures

Scientific paper

10.1103/PhysRevA.83.043625

We consider decay of a quasiparticle in a nearly-one-dimensional quasicondensate of trapped atoms, where virtual excitations of transverse modes break down one-dimensionality and integrability, giving rise to effective three-body elastic collisions. We calculate the matrix element for the process that involves one incoming quasiparticle and three outgoing quasiparticles. Scattering that involves low-frequency modes with high thermal population results in a diffusive dynamics of a bunch of quasiparticles created in the system.

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