Nonequilibrium quantum dynamics of atomic dark solitons

Details Nonequilibrium quantum dynamics of atomic dark solitons Nonequilibrium quantum dynamics of atomic dark solitons

2010-01-19

arxiv.org/abs/1001.3385v1

New Journal of Physics 12 (2010) 055018

Physics

Condensed Matter

Quantum Gases

19 pages, 9 figures, to appear in New Journal of Physics

Scientific paper

10.1088/1367-2630/12/5/055018

We study quantum dynamics of bosonic atoms that are excited to form a phase kink, or several kinks, by an imprinting potential in a one-dimensional trap. We calculate dissipation due to quantum and thermal fluctuations in soliton trajectories, collisions and the core structure. Single-shot runs show weak filling of a soliton core, typically deeper solitons in the case of stronger fluctuations and spreading/disappearing solitons due to collisions. We also analyze a soliton system in an optical lattice that shows especially strong fluctuation-induced phenomena.

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