We derive a resonance field-theory for ultra-cold Bose or Fermi gases that is valid when scattering resonances are present. Experiments with a ^85Rb condensate have shown new interesting physics close to resonance(N.R. Claussen, E.A. Donley, S.T. Thompson, C.E. Wieman, e-print cond-mat/0201400.). It is also expected that utilizing a Feshbach resonance can greatly enhance the critical temperature for superfluidity in a Fermi gas(M. Holland, S.J.J.M.F. Kokkelmans, M.L. Chiofalo, and R. Walser, Phys. Rev. Lett. 87), 120406 (2001).. Therefore it is important to treat the rich scattering physics properly inside a many-body theory. We show that the scattering length only is insufficient to describe a system close to resonance. Our many-body equations have build-in the two-body scattering equations, and we include the full scattering solution over the relevant energy range by means of a renormalized resonance scattering theory(S.J.J.M.F. Kokkelmans, J.N. Milstein, M.L. Chiofalo, R. Walser, and M.J. Holland, e-print cond-mat/0112283.).
|Publication status||Published - 1 May 2002|
|Event||33rd Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2002 - Williamsburg, United States|
Duration: 29 Jun 2002 → 1 Jul 2002
Conference number: 33
|Conference||33rd Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2002|
|Abbreviated title||DAMOP 2002|
|Period||29/06/02 → 1/07/02|