Theoretical Nanophysics

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Near-threshold Feshbach resonances

Frauke Schwarz (TUM)

27.07.2012 at 10:15 

Feshbach resonances have become the major tool for controlling interatomic interactions in the physics of ultracold quantum gases. For deep interatomic potentials with attractive tails, we present an energy-independent parametrization of such a resonance to reveal its impact on the scattering properties as well as on the bound state spectrum. Furthermore, this parametrization provides an explicit separation of channel-coupling effects from the influence of "background" properties of the uncoupled system.

A449 - Theresienstr. 37