Feshbach resonances in ultracold gases

2014/01/10 by S. J. J. M. F. Kokkelmans · 4 citations
Physics and Astronomy · #cond-mat.quant-gas

paper · pdf · doi:10.1142/9781783264766_0004

23 pages, 3 figures. This article will be published as Chapter 4 in "Quantum gas experiments - exploring many-body states", edited by P. Törmä and K. Sengstock, Imperial College Press, London, to be published 2014

arxiv created 2014/01/10 · arxiv updated 2017/08/23

Abstract

In this chapter, we describe scattering resonance phenomena in general, and focus on the mechanism of Feshbach resonances, for which a multi-channel treatment is required. We derive the dependence of the scattering phase shift on magnetic field and collision energy. From this, the scattering length and effective range coefficient can be extracted, expressions which are particularly useful for ultracold gases.

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