Abstract
Collisional deactivation is analyzed using a multichannel zero-range
potential method. The deactivation products are associated to a set of
open channels, while introduction of a closed channel leads to a
Feshbach resonance, allowing control of elastic scattering. In the case
of free space the deactivation rate coefficient has a finite zero-energy
limit. It increases with the elastic scattering length, demonstrating
also the effect of interference of open and closed channel deactivation.
A tight confinement in atomic waveguides leads to a drastic change of
the deactivation rate behavior. At large elastic scattering length, the
rate coefficient decreases to zero at low collision energies. The
present two-body analysis is in agreement with the many-body
consideration of indistinguishable particles [1], being applicable to
non-identical particles as well. The general behavior of two-body
correlations [1] can be reproduced in the present two-body picture. 1.
D. M. Gangardt and G. V. Shlyapnikov, Phys. Rev. Lett. 90, 010401
(2003).
| Original language | English GB |
|---|---|
| Title of host publication | American Physical Society, 37th Meeting of the Division of Atomic, Molecular and Optical Physics, May 16-20, 2006 |
| State | Published - 2006 |