Atom-Dimer Scattering in a Three-Component Fermi Gas
arXiv:1003.0600 · doi:10.1103/PhysRevLett.105.103201
Abstract
Ultracold gases of three distinguishable particles with large scattering lengths are expected to show rich few-body physics related to the Efimov effect. We have created three different mixtures of ultracold 6Li atoms and weakly bound 6Li2 dimers consisting of atoms in three different hyperfine states and studied their inelastic decay via atom-dimer collisions. We have found resonant enhancement of the decay due to the crossing of Efimov-like trimer states with the atom-dimer continuum in one mixture as well as minima of the decay in another mixture, which we interpret as a suppression of exchange reactions of the type |12>+|3> -> |23>+|1>. Such a suppression is caused by interference between different decay paths and demonstrates the possiblity to use Efimov physics to control the rate constants for molecular exchange reactions in the ultracold regime.
5 pages, 3 figures
References in corpus (11)
- Observation of an Efimov spectrum in an atomic system
- Collisional stability of a three-component degenerate Fermi gas
- Three-body recombination in a three-state Fermi gas with widely tunable interactions
- Observation of universality in ultracold 7Li three-body recombination
- Observation of an Efimov-like resonance in ultracold atom-dimer scattering
- Evidence for Universal Four-Body States Tied to an Efimov Trimer
- Observation of heteronuclear atomic Efimov resonances
- Limits on Universality in Ultracold Three-Boson Recombination
- Thermal equilibrium and efficient evaporation of an ultracold atom-molecule mixture
- Three-body loss in lithium from functional renormalization
- Ultracold atom-molecule collisions with fermionic atoms