Universal three-body physics at finite energies

POSTER

Abstract

We discuss the universal three-body scattering physics for cold atoms up to energies far beyond the ultracold limit. We have found universal features in the energy-dependence of the three-body recombination rates which can be traced to Efimov physics. These new features, however, have different character for positive and negative scattering length ($a$) because the high partial wave contributions are very different. In particular, we show that for $a>0$, the very high partial wave contributions are still important in a certain energy range. For $a<0$, however, the $S$-wave contribution is dominant up to the highest energy where the three-body recombination is universal. We also discuss modifications of the universal three-body physics that arise near a narrow Feshbach resonance. Our results provide a complete picture for the universal features in the three-body recombination, and will assist the experimental study of the universal three-body physics under very different experimental conditions.

*Supported by the National Science Foundation.

Authors

  • Yujun Wang

    • JILA and Department of Physics, University of Colorado at Boulder and Department of Physics, Kansas State University
    • JILA, Department of Physics, University of Colorado
    • JILA, Department of Physics, University of Colorado at Boulder
    • JILA and Department of Physics, University of Colorado at Boulder

  • J. P. D&#039;Incao

    • JILA and Department of Physics, University of Colorado at Boulder
    • JILA and University of Colorado
    • Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA
    • JILA, Department of Physics, University of Colorado at Boulder

  • Brett Esry

    • Department of Physics, Kansas State University
    • Dept. of Physics, Kansas State University
    • Dept. of Physics, Kansas State
    • J.R.Macdonald Laboratory, Department of Physics, Kansas State University

  • Chris H. Greene

    • JILA, Department of Physics, University of Colorado at Boulder
    • JILA and Department of Physics, University of Colorado at Boulder
    • JILA, Physics dept, University of Colorado at Boulder
    • Department of Physics and JILA, University of Colorado, Boulder, CO 80309, USA