Triatomic continuum resonances for large negative scattering lengths

Details Triatomic continuum resonances for large negative scattering lengths Triatomic continuum resonances for large negative scattering lengths

2003-12-11

arxiv.org/abs/cond-mat/0312291v2

Phys.Rev.A69:040702,2004

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.69.040702

We study triatomic systems in the regime of large negative scattering lengths which may be more favorable for the formation of condensed trimers in trapped ultracold monoatomic gases as the competition with the weakly bound dimers is absent. The manipulation of the scattering length can turn an excited weakly bound Efimov trimer into a continuum resonance. Its energy and width are described by universal scaling functions written in terms of the scattering length and the binding energy, $B_3$, of the shallowest triatomic molecule. For $a^{-1}<-0.0297 \sqrt{m B_3/\hbar^2}$ the excited Efimov state turns into a continuum resonance.

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