Vector light shift averaging in paraffin-coated alkali vapor cells

Elena Zhivun, Arne Wickenbrock, Julia Sudyka, Brian Patton, Szymon Pustelny & Dmitry Budker
Light shifts are an important source of noise and systematics in optically pumped magnetometers. We demonstrate that the long spin-coherence time in paraffin-coated cells leads to spatial averaging of the vector light shift over the entire cell volume. This renders the averaged vector light shift independent, under certain approximations, of the light-intensity distribution within the sensor cell. Importantly, the demonstrated averaging mechanism can be extended to other spatially varying phenomena in anti-relaxation-coated cells with long...
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