G-Gran Sasso: an experiment for the terrestrial measurement of the Lense-Thirring effect by means of ring lasers

The talk presents a proposal for a new experiment aimed at the detection of the gravito-magnetic Lense-Thirring effect at the surface of the Earth. The proposed technique uses a three-dimensional set of gyrolasers and exploits the anisotropic propagation of light in the gravitational field of a rotating mass. The experiment is planned to be built in the Gran Sasso National Laboratories in Italy and is based on an international collaboration among various Italian groups, the Technische Universitaet Muenchen and the Canterbury University in Christchurch (NZ).