Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-08-27
Phys.Rev.A81:013605,2010
Physics
Condensed Matter
Quantum Gases
27 pages, 9 figures, REVTeX4, published version
Scientific paper
10.1103/PhysRevA.81.013605
A new narrow 3-atom loss resonance associated with an Efimov trimer crossing the 3-atom threshold has recently been discovered in a many-body system of ultracold 6Li atoms in the three lowest hyperfine spin states at a magnetic field near 895 G. O'Hara and coworkers have used measurements of the 3-body recombination rate in this region to determine the complex 3-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 3-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 (672 +/- 2) G associated with an Efimov trimer disappearing through an atom-dimer threshold. We also predict an interference minimum in the 3-body recombination rate at (759 +/- 1) G where the 3-spin mixture may be sufficiently stable to allow experimental study of the many-body system.
Braaten Eric
Hammer Hans-Werner
Kang Daekyoung
Platter Lucas
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