Efimov states embedded in the three-body continuum

Details Efimov states embedded in the three-body continuum Efimov states embedded in the three-body continuum

2008-01-14

arxiv.org/abs/0801.2002v1

Phys. Rev. A 78, 020701 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages 3 figures

Scientific paper

10.1103/PhysRevA.78.020701

We consider a multichannel generalization of the Fermi pseudopotential to model low-energy atom-atom interactions near a magnetically tunable Feshbach resonance, and calculate the adiabatic hyperspherical potential curves for a system of three such interacting atoms. In particular, our model suggests the existence of a series of quasi-bound Efimov states attached to excited three-body thresholds, far above open channel collision energies. We discuss the conditions under which such states may be supported, and identify which interaction parameters limit the lifetime of these states. We speculate that it may be possible to observe these states using spectroscopic methods, perhaps allowing for the measurement of multiple Efimov resonances for the first time.

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