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

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

2012-03-30

arxiv.org/abs/1203.6690v1

Physics

Condensed Matter

Quantum Gases

4.5 pages, 4 figures

Scientific paper

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 non-interacting limit. The interaction properties essentially rely on the resonance width of CIR. Universal thermodynamics is identified for scattering branch right at wide CIR, but is found to be 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.

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