Quantum gray solitons in confining potentials
arXiv:1109.4310 · doi:10.1103/PhysRevLett.108.085301
Abstract
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.
5 pages, 2 figures
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- Kinetics of mobile impurities and correlation functions in one-dimensional superfluids at finite temperature
- Non-Markovian quantum friction of bright solitons in superfluids
- Lieb's soliton-like excitations in harmonic trap
- Thermal solitons as revealed by static structure factor
- Simultaneous symmetry breaking in spontaneous Floquet states: temporal Floquet-Nambu-Goldstone modes, Floquet thermodynamics, and the time operator
- Collisional dynamics of multiple dark solitons in a toroidal Bose-Einstein condensate: Quasiparticle picture