Precision gravity measurements with cold atoms interferometry
by
Guglielmo Tino(Firenze University)
→
Europe/Rome
131 (Building C, ground floor)
131
Building C, ground floor
Description
I will describe experiments we are conducting for precision tests of gravitational physics using cold atom interferometry. In particular, I will report on the measurement of the gravitational constant G with a Rb Raman interferometer [1], and on experiments based on Bloch oscillations of Sr atoms confined in an optical lattice for gravity measurements at small spatial scales [2] and for testing Einstein equivalence principle [3]. Future prospects for experiments in space will be also discussed [4].
[1] G. Rosi, F. Sorrentino, L. Cacciapuoti, M. Prevedelli, G. M. Tino, Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms, Nature 510, 518 (2014).
[2] F. Sorrentino, A. Alberti, G. Ferrari, V. V. Ivanov, N. Poli, M. Schioppo, G. M. Tino, Quantum sensor for atom-surface interactions below 10 μm, Phys. Rev. A 79, 013409 (2009).
[3] M.G. Tarallo, T. Mazzoni, N. Poli, D.V. Sutyrin, X. Zhang, G. M. Tino, Test of Einstein Equivalence Principle for 0-Spin and Half-Integer-Spin Atoms: Search for Spin-Gravity Coupling Effects, Phys. Rev. Lett. 113, 023005 (2014).
[4] G. M. Tino et al., Precision Gravity Tests with Atom Interferometry in Space, Nuclear Physics B (Proc. Suppl.) 243–244, 203 (2013).
