Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances

Details Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances

2011-11-23

arxiv.org/abs/1111.5503v3

Phys. Rev. Lett. 108, 130403 (2012)

Physics

Condensed Matter

Quantum Gases

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.108.130403

A universal dimer is subject to secondary collisions with atoms when formed in a cloud of ultracold atoms via three-body recombination. We show that in a collisionally opaque medium, the value of the scattering length that results in the maximum number of secondary collisions may not correspond to the Efimov resonance at the atom-dimer threshold and thus can not be automatically associated with it. This result explains a number of controversies in recent experimental results on universal three-body states and supports the emerging evidence for the significant finite range corrections to the first excited Efimov energy level.

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