= Michael Romalis
{c}
<Michael Romalis> develops <optical magnetometry>, in which resonant <light> prepares or reads an atomic vapour's response to a <magnetic field>. His review with <Dmitry Budker> explains how atomic spin dynamics can provide sensitive magnetic sensing.<Optical Magnetometry by Dmitry Budker and Michael Romalis>[Abstract and operating principles of atomic-vapour magnetometers]{ref}
The atoms supply the field-sensitive reference, and changes of transmitted or emitted <light> provide the readout. The approach connects <atomic physics> with measurements of weak biological or geophysical <magnetic fields>, rather than requiring a conducting pickup coil for every measurement.
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