Two-channel model description of confinement-induced Feshbach molecules
arXiv:1210.2158 · doi:10.1103/PhysRevA.86.033601
Abstract
Using a two-channel model, we investigate theoretically the binding energy of confinement-induced Feshbach molecules in two- and one-dimensional ultracold atomic systems, near a Feshbach resonance. We show that the two-channel prediction will evidently deviate from the simple single-channel theory as the width of Feshbach resonances decreases. For one-dimensional system, we perform a full two-channel calculation, with the inclusion of bare interatomic interactions in the open channel. Away from the resonance, we find a sizable correction to the binding energy, if we neglect incorrectly the bare interatomic interactions as in the previous work [Dickerscheid and Stoof, Phys. Rev. A 72, 053625 (2005)]. We compare our theoretical results with existing experimental data and present predictions for narrow Feshbach resonances that could be tested in future experiments.
arXiv comment8 pages, 5 figures
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- Virial expansion of a harmonically trapped Fermi gas across a narrow Feshbach resonance
- Spin-orbit-induced bound state and molecular signature of the degenerate Fermi gas in a narrow Feshbach resonance
- Bound and scattering states in harmonic waveguides in the vicinity of free space Feshbach resonances