We present the scientific motivation for future space tests of the equivalence principle, and in particular the universality of free fall, at the 10− 17 level or better. Two possible mission scenarios, one based on quantum technologies, the other on electrostatic accelerometers, that could reach that goal are briefly discussed. This publication is a White Paper written in the context of the Voyage 2050 ESA Call for White Papers. © 2021, The Author(s).
Export Date: 28 September 2021; Article; Correspondence Address: Battelier, B.; LP2N, 1 Rue François Mitterand, France; email: baptiste.battelier@institutoptique.fr