Multichannel scattering resonance of one-dimensional ultracold spinor bosons

So far, the interaction of ultracold atoms can only be tuned within one particular scattering channel near a resonance, where the spinor structure of atomic isotopes is destroyed due to the typically large magnetic field. In this work, we propose a scheme to realize multichannel scattering resonance (MCSR) of ultracold bosons in one-dimension while still keeping their spinor structure. The MCSR refers to a simultaneous scattering resonance among all different scattering channels, including those breaking SU(2) and SO(2) spin-rotation symmetries. Essential ingredients for MCSR include the three-dimensional interactions, the confinement potential, and a spin-flipping field. Near MCSR a many-body spinor system exhibits exotic spin-density distributions and pair correlations, which are significantly different from those near a single-channel resonance.