A compact and fast magnetic coil for the interaction manipulation of quantum gases with Feshbach resonances

TL;DR

This paper introduces a compact, rapid-response magnetic coil and control circuit capable of changing magnetic fields up to 36G within 3 microseconds, enabling advanced quantum gas experiments.

Contribution

A novel coil design and control system that significantly speeds up magnetic field changes for manipulating quantum gases with Feshbach resonances.

Findings

Achieves 36G magnetic field change in 3 microseconds

Compact design suitable for existing experimental setups

Facilitates observation of non-equilibrium physics

Abstract

Cold atom experiments commonly use broad magnetic Feshbach resonances to manipulate the interaction between atoms. In order to induce quantum dynamics by a change of the interaction strength, rapid ($\sim\mu s$) 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 of the magnetic field up to $36G$ in $3\mu s$. 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.