Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.085301
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Funding
- EPSRC [EP/D072514/1]
- EPSRC [EP/D072514/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D072514/1] Funding Source: researchfish
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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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