Three-body recombination in Bose gases with large scattering length

Abstract

An effective field theory for the three-body system with large scattering length is applied to three-body recombination to a weakly-bound s-wave state in a Bose gas. Our model independent analysis demonstrates that the three-body recombination constant alpha is not universal, but can take any value between zero and 67.9 \hbar a^4/m, where a is the scattering length. Other low-energy three-body observables can be predicted in terms of a and alpha. Near a Feshbach resonance, alpha should oscillate between those limits as the magnetic field B approaches the point where a -> infinity. In any interval of B over which a increases by a factor of 22.7, alpha should have a zero.

8 pages, RevTex, 3 postscript figures, uses epsf.sty, rotate.sty, references added, discussion improved

References in corpus (2)

• Atom loss from Bose-Einstein condensates due to Feshbach resonance
• Higher Partial Waves in an Effective Field Theory Approach to nd Scattering

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