735 citations · 5.5k across the 67 of their papers we have counts for
35 papers · 1 filter
Measuring gravity by holding atoms
Cristian D. Panda, Matthew J. Tao, Miguel Ceja +1
Despite being the dominant force of nature on large scales, gravity remains relatively elusive to experimental measurement. Many questions remain, such as its behavior at small sca…
Towards the formation of a positronium coherent beam
M. Sacerdoti, V. Toso, G. Vinelli +5
Positronium (Ps) has emerged as a promising test particle within the QUPLAS collaboration for investigating the gravitational effect. In this work, we present a novel approach to g…
A large-momentum-transfer matter-wave interferometer to measure the effect of gravity on positronium
G. Vinelli, F. Castelli, R. Ferragut +7
This paper reports the study of a new interferometric configuration to measure the effect of gravity on positronium. A Mach-Zehnder matter-wave interferometer has been designed to…
Atom Interferometry with the Rb Blue Transitions
L. Salvi, G. M. Tino, L. Cacciapuoti +1
We demonstrate a novel scheme for Raman-pulse and Bragg-pulse atom interferometry based on the blue transitions of Rb that provides an increase b…
New apparatus design for high-precision measurement ofG with atom interferometry
M. Jain, G. M. Tino, L. Cacciapuoti +1
We propose a new scheme for an improved determination of the Newtonian gravitational constant G and evaluate it by numerical simulations. Cold atoms in free fall are probed by atom…
Technologies for the ELGAR large scale atom interferometer array
B. Canuel, S. Abend, P. Amaro-Seoane +56
We proposed the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an array of atom gradiometers aimed at studying space-time and gravitation with the p…
ELGAR -- a European Laboratory for Gravitation and Atom-interferometric Research
B. Canuel, S. Abend, P. Amaro-Seoane +55
Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend the detection band…
Sr atom interferometry with the optical clock transition as a gravimeter and a gravity gradiometer
Liang Hu, Enlong Wang, Leonardo Salvi +3
We characterize the performance of a gravimeter and a gravity gradiometer based on the S-P clock transition of strontium atoms. We use this new quantum sensor t…
Bragg gravity-gradiometer using the S-P intercombination transition of Sr
Ruben P. del Aguila, Tommaso Mazzoni, Liang Hu +3
We present a gradiometer based on matter-wave interference of alkaline-earth-metal atoms, namely Sr. The coherent manipulation of the atomic external degrees of freedom is o…
Atom interferometry with the Sr optical clock transition
Liang Hu, Nicola Poli, Leonardo Salvi +1
We report on the realization of a matter-wave interferometer based on single-photon interaction on the ultra-narrow optical clock transition of strontium atoms. We experimentally d…
Squeezing on momentum states for atom interferometry
Leonardo Salvi, Nicola Poli, Vladan Vuletic +1
We propose and analyse a method that allows for the production of squeezed states of the atomic center-of-mass motion that can be injected into an atom interferometer. Our scheme e…
Quantum test of the equivalence principle for atoms in superpositions of internal energy eigenstates
G. Rosi, G. D'Amico, L. Cacciapuoti +5
The Einstein Equivalence Principle (EEP) has a central role in the understanding of gravity and space-time. In its weak form, or Weak Equivalence Principle (WEP), it directly impli…
A trapped atom interferometer with ultracold Sr atoms
Xian Zhang, Ruben Pablo del Aguila, Tommaso Mazzoni +2
We report on a trapped atom interferometer based on Bragg diffraction and Bloch oscillations with alkaline-earth-metal atoms. We use a Ramsey-Bordé Bragg interferometer with $^{88}…
Large-momentum-transfer Bragg interferometer with strontium atoms
T. Mazzoni, X. Zhang, R. Del Aguila +3
We report on the first atom interferometer based on Bragg diffraction in a fountain of alkaline-earth atoms, namely Sr. We demonstrate large momentum transfer to the atoms u…
Development of a strontium optical lattice clock for the SOC mission on the ISS
K. Bongs, Y. Singh, L. Smith +24
Ultra-precise optical clocks in space will allow new studies in fundamental physics and astronomy. Within an European Space Agency (ESA) program, the Space Optical Clocks (SOC) pro…
Measurement of the Gravity-Field Curvature by Atom Interferometry
G. Rosi, L. Cacciapuoti, F. Sorrentino +3
We present the first direct measurement of the gravity-field curvature based on three conjugated atom interferometers. Three atomic clouds launched in the vertical direction are si…
Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms
G. Rosi, F. Sorrentino, L. Cacciapuoti +2
About 300 experiments have tried to determine the value of the Newtonian gravitational constant, G, so far, but large discrepancies in the results have made it impossible to know i…
Test of Einstein Equivalence Principle for 0-spin and half-integer-spin atoms: Search for spin-gravity coupling effects
M. G. Tarallo, T. Mazzoni, N. Poli +3
We report on a conceptually new test of the equivalence principle performed by measuring the acceleration in Earth's gravity field of two isotopes of strontium atoms, namely, the b…
Optical atomic clocks
N. Poli, C. W. Oates, P. Gill +1
In the last ten years extraordinary results in time and frequency metrology have been demonstrated. Frequency-stabilization techniques for continuous-wave lasers and femto-second o…
Differential atom interferometry with Rb and Rb for testing the UFF in STE-QUEST
C Schubert, J Hartwig, H Ahlers +18
In this paper we discuss in detail an experimental scheme to test the universality of free fall (UFF) with a differential Rb / Rb atom interferometer applicable for e…
Coherent control of quantum transport: modulation-enhanced phase detection and band spectroscopy
Marco G. Tarallo, Nicola Poli, F. Y. Wang +1
Amplitude modulation of a tilted optical lattice can be used to steer the quantum transport of matter wave packets in a very flexible way. This allows the experimental study of the…
A compact and efficient strontium oven for laser-cooling experiments
Marco Schioppo, Nicola Poli, Marco Prevedelli +4
Here we describe a compact and efficient strontium oven well suited for laser-cooling experiments. Novel design solutions allowed us to produce a collimated strontium atomic beam w…
Delocalization-enhanced Bloch oscillations and driven resonant tunneling in optical lattices for precision force measurements
M. G. Tarallo, A. Alberti, N. Poli +3
In this paper we describe and compare different methods used for accurate determination of forces acting on matter-wave packets in optical lattices. The quantum interference nature…
Precision measurement of gravity with cold atoms in an optical lattice and comparison with a classical gravimeter
N. Poli, F. -Y. Wang, M. G. Tarallo +3
We report on a high precision measurement of gravitational acceleration using ultracold strontium atoms trapped in a vertical optical lattice. Using amplitude modulation of the lat…