Efimov Physics in Atom-Dimer Scattering of Lithium-6 Atoms

Details Efimov Physics in Atom-Dimer Scattering of Lithium-6 Atoms Efimov Physics in Atom-Dimer Scattering of Lithium-6 Atoms

2010-06-11

arxiv.org/abs/1006.2393v2

Phys. Rev. A82:022715,2010

Physics

Condensed Matter

Quantum Gases

13 pages, 5 figures, final version

Scientific paper

10.1103/PhysRevA.82.022715

Lithium-6 atoms in the three lowest hyperfine states display universal properties when the S-wave scattering length between each pair of states is large. Recent experiments reported four pronounced features arising from Efimov physics in the atom-dimer relaxation rate, namely two resonances and two local minima. We use the universal effective field theory to calculate the atom-dimer relaxation rate at zero temperature. Our results describe the four features qualitatively and imply there is a hidden local minimum. In the vicinity of the resonance at 685 G, we perform a finite temperature calculation which improves the agreement of theory and experiment. We conclude that finite temperature effects cannot be neglected in the analysis of the experimental data.

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