Light and/or atomic beams to detect ultraweak gravitational effects Angelo Tartaglia, Jacopo Belfi, Nicolò Beverini, Angela Di Virgilio, Antonello Ortolan, Alberto Porzio and Matteo Luca Ruggiero EPJ Web of Conferences, 74 (2014) 03001 Published online: 11 June 2014 DOI: 10.1051/epjconf/20147403001