Abstract
A new narrow three-atom loss resonance associated with an Efimov trimer crossing the three-atom threshold has recently been discovered in a many-body system of ultracold atoms in the three lowest hyperfine spin states at a magnetic field near 895 G. O’Hara and coworkers have used measurements of the three-body recombination rate in this region to determine the complex three-body parameter associated with Efimov physics. Using this parameter as the input, we calculate the universal predictions for the spectrum of Efimov states and for the three-body recombination rate in the universal region above 600 G where all three scattering lengths are large. We predict an atom-dimer loss resonance at G associated with an Efimov trimer disappearing through an atom-dimer threshold. We also predict an interference minimum in the three-body recombination rate at G where the three-spin mixture may be sufficiently stable to allow experimental study of the many-body system.
2 More- Received 28 August 2009
DOI:https://doi.org/10.1103/PhysRevA.81.013605
©2010 American Physical Society