Sensitivity limit investigation of a Sagnac gyroscope through linear regression analysis
Angela D. Di Virgilio, Carlo Altucci, Francesco Bajardi, Andrea Basti, Nicolò Beverini, Salvatore Capozziello, Giorgio Carelli, Donatella Ciampini, Francesco Fuso, Umberto Giacomelli, Enrico Maccioni, Paolo Marsili, Antonello Ortolan, Alberto Porzio, Andrea Simonelli, Giuseppe Terreni, Raffaele Velotta
Abstract
Abstract The sensitivity to angular rotation of the top class Sagnac gyroscope GINGERINO is carefully investigated with standard statistical means, using 103 days of continuous operation and the available geodesic measurements of the Earth angular rotation rate. All features of the Earth rotation rate are correctly reproduced. The unprecedented sensitivity of fractions of frad/s is attained for long term runs. This excellent sensitivity and stability put Sagnac gyroscopes at the forefront for fundamental physics, in particular for tests of general relativity and Lorentz violation, where the sensitivity plays the key role to provide reliable data for deeper theoretical investigations.