Quantum gray solitons in confining potentials |
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Authors: | Wadkin-Snaith Dominic C Gangardt Dimitri M |
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Affiliation: | School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, United Kingdom. |
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Abstract: | We define and study holelike 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 lifetime of these excitations. 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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