Subtraction of Newtonian Noise Using Optimized Sensor Arrays

Understand

Fluctuations in the local Newtonian gravitational field present a limit to high precision measurements, including searches for gravitational waves using laser interferometers.

• In this work, we present a model of this perturbing gravitational field and evaluate schemes to mitigate the effect by estimating and subtracting it from the interferometer data stream.
• Information about the Newtonian noise is obtained from simulated seismic data.
• The method is tested on causal as well as acausal implementations of noise subtraction.