Precision gravity measurements with cold atom interferometry

14 01/2015

Wednesday, 14 Jan. 2015, 10:00 - 12:00

Workgroup Brukner Group

Presenter: Guglielmo M. Tino
Host: C. Brukner
Where: Ernst-Mach-Hörsaal, 2nd Floor Boltzmanngasse 5, 1090 Vienna

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 Newtonian gravitational constant (1) and of the gravity-field curvature (2) with a Rb Raman interferometer, and on experiments based on Bloch oscillations of Sr atoms in optical lattices for gravity measurements at small spatial scales (3) and for testing the Einstein equivalence principle (4). Future prospects for experiments in space will be also discussed (5).

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. G. Rosi, L. Cacciapuoti, F. Sorrentino, M. Menchetti, M. Prevedelli, G. M. Tino, Measurement of the gravity-field curvature by atom interferometry, Phys. Rev. Lett., in press (2015)

3. 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).

4. 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).

5. G. M. Tino et al., Precision Gravity Tests with Atom Interferometry in Space, Nuclear Physics B (Proc. Suppl.) 243–244, 203 (2013).