Quasi-1D atomic gases across wide and narrow confinement-induced-resonances

Abstract

We study quasi-one-dimensional atomic gases across wide and narrow confinement-induced-resonances (CIR). We show from Virial expansion that by tuning the magnetic field, the repulsive scattering branch initially prepared at low fields can continuously go across CIR without decay; instead, the decay occurs when approaching the non-interacting limit. The interaction properties essentially rely on the resonance width of CIR. Universal thermodynamics holds for scattering branch right at wide CIR, but is smeared out in narrow CIR due to strong energy-dependence of coupling strength. In wide and narrow CIR, the interaction energy of scattering branch shows different types of strong asymmetry when approaching the decay from opposite sides of magnetic field. Finally we discuss the stability of repulsive branch for a repulsively interacting Fermi gas in different trapped geometries at low temperatures.

7 pages, 4 figures

References in corpus (6)

• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Three-boson problem near a narrow Feshbach resonance
• Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
• Virial expansion for a strongly correlated Fermi gas
• Feshbach resonance scattering under cylindrical harmonic confinement
• High temperature thermodynamics of strongly interacting s-wave and p-wave Fermi gases in a harmonic trap

Cited by in corpus (6)

• Phase Separation in Mixtures of Repulsive Fermi Gases Driven by Mass Difference
• Probing open- and closed-channel p-wave resonances
• Many-body properties of quasi-one dimensional Boson gas across a narrow CIR
• Universal relations for hybridized $s$- and $p$-wave interactions from spin-orbital coupling
• Spectral density, Levinson's theorem, and the extra term in the second virial coefficient for 1D delta-function potential
• Large-momentun tail of one-dimensional Fermi gases with spin-orbit coupling