Universal Dimer in a Collisionally Opaque Medium: Experimental Observables and Efimov Resonances
arXiv:1111.5503 · doi:10.1103/PhysRevLett.108.130403
Abstract
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.
5 pages, 2 figures
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- Probing strongly interacting atomic gases with energetic atoms
- Looking for "avalanche-mechanism" loss at an atom-molecule Efimov resonance
- Three-body recombination of two-component cold atomic gases into deep dimers in an optical model
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- Three-body Physics in Strongly Correlated Spinor Condensates
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- A coherent superposition of Feshbach dimers and Efimov trimers
- Observation of Anomalous Decay of a Polarized Three-Component Fermi Gas
- The Avalanche Mechanism for Atom Loss near an Atom-Dimer Efimov Resonance
- Avalanche Mechanism for the Enhanced Loss of Ultracold Atoms
- Efimov states in Li-Cs mixtures within a minimal model