Quantum gray solitons in confining potentials

Details Quantum gray solitons in confining potentials Quantum gray solitons in confining potentials

2011-09-20

arxiv.org/abs/1109.4310v3

Phys. Rev. Lett. 108, 085301 (2012)

Physics

Condensed Matter

Quantum Gases

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.108.085301

We define and study hole-like excitations (the Lieb II mode) in a weakly interacting Bose liquid subject to external confinement. These excitations are obtained by semiclassical quantization of gray solitons propagating on top of a Thomas-Fermi background. Radiation of phonons by an accelerated gray soliton leads to a finite life-time for the trapped Lieb II mode. It is shown that, for a large number of trapped atoms, most of the Lieb II levels can be experimentally resolved.

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