Cold atom experiments commonly use broad magnetic Feshbach resonances to manipulate the interaction between atoms. In order to induce quantum dynamics by a change in the interaction strength, rapid (∼μs) magnetic field changes over several tens of Gauss are required. Here, we present a compact design of a coil and its control circuit for a change in the magnetic field up to 36 G in 3 µs. The setup comprises two concentric solenoids with minimal space requirements, which can be readily added to existing apparatuses. This design makes the observation of non-equilibrium physics with broad Feshbach resonances accessible.
A compact and fast magnetic coil for the manipulation of quantum gases with Feshbach resonances
A. Kell, M. Link, M. Breyer, A. Hoffmann, M. Köhl, K. Gao; A compact and fast magnetic coil for the manipulation of quantum gases with Feshbach resonances. Rev. Sci. Instrum. 1 September 2021; 92 (9): 093202. https://doi.org/10.1063/5.0049518
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