Conditions for Efimov Physics for Finite Range Potentials

Details Conditions for Efimov Physics for Finite Range Potentials Conditions for Efimov Physics for Finite Range Potentials

2009-09-25

arxiv.org/abs/0909.4649v1

Phys. Rev. A 80, 013608 (2009)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.80.013608

We consider a system of three identical bosons near a Feshbach resonance in the universal regime with large scattering length usually described by model independent zero-range potentials. We employ the adiabatic hyperspherical approximation and derive the rigorous large-distance equation for the adiabatic potential for finite-range interactions. The effective range correction to the zero-range approximation must be supplemented by a new term of the same order. The non-adiabatic term can be decisive. Efimov physics is always confined to the range between effective range and scattering length. The analytical results agree with numerical calculations for realistic potentials.

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