Previous protocols achieved higher uncertainty for the same amount of time, or equivalently, achieved the same uncertainty but in a longer time.
It is an entanglement-based protocol to measure simultaneously multiple analytic functions of a set of parameters coupled to qubit sensors.
This protocol can be used to measure properties of spatially varying fields such as magnetic fields, electric fields, gravitational fields, and temperature, with applications in fields such as chemistry, medicine, biology, materials science, physics, geodesy, and geophysics.