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Quantum test of the Universality of Free Fall using rubidium and potassium

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TLDR
In this article, an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer was reported. But their results were limited to the case of the Eotvos ratio.
Abstract
We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a potassium interferometer, as well as systematic effects affecting our measurement. Our determination of the Eotvos ratio yields $\eta_{\,\text{Rb,K}}=-1.9\times10^{-7}$ with a combined standard uncertainty of $\sigma_\eta=3.2\times10^{-7}$.

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Cold atoms in space: community workshop summary and proposed road-map

Iván Alonso, +246 more
TL;DR: In this paper , the status of cold atom technologies, the prospective scientific and societal opportunities offered by their deployment in space, and the developments needed before cold atoms could be operated in space.
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Interacting quantum mixtures for precision atom interferometry

TL;DR: In this article, a source engineering concept for a binary quantum mixture suitable as input for differential, precision atom interferometry with drift times of several seconds is presented, and a set of scaling approach equations and verify their validity contrasting it to the one of a system of coupled Gross-Pitaevskii equations.
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Resolving the Singularity by Looking at the Dot and Demonstrating the Undecidability of the Continuum Hypothesis

TL;DR: In this article , a non-singular theory of gravity has been proposed and it is shown that the above mentioned hypothesis is only valid in an approximate sense in the "large distance" scenario.
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All-optical matter-wave lens using time-averaged potentials

TL;DR: In this paper , a cross-optical dipole trap was used to create cold matter-waves using a crossed optical dipoletrap and shaping them by means of an all-Optical matter-wave lens.
References
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Journal ArticleDOI

The Confrontation Between General Relativity and Experiment

TL;DR: Tests of general relativity at the post-Newtonian level have reached high precision, including the light deflection, the Shapiro time delay, the perihelion advance of Mercury, the Nordtvedt effect in lunar motion, and frame-dragging.
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Atomic interferometry using stimulated Raman transitions

TL;DR: The mechanical effects of stimulated Raman transitions on atoms have been used to demonstrate a matter-wave interferometer with laser-cooled sodium atoms that has observed interference for wave packets that have been separated by as much as 2.4 mm.
Journal ArticleDOI

Observation of Gravitationally Induced Quantum Interference

TL;DR: In this article, the authors used a neutron interferometer to observe the quantum-mechanical phase shift of neutrons caused by their interaction with Earth's gravitational field, which is known as the Earth's magnetic field.
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Measurement of gravitational acceleration by dropping atoms

TL;DR: In this article, an atom interferometer based on a fountain of laser-cooled atoms was used to measure the acceleration of gravity, achieving an absolute uncertainty of Δg/g ≈ 3 × 10−9.
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High-precision gravity measurements using atom interferometry

TL;DR: In this article, an atom interferometer that can measure g, the local acceleration due to gravity, with a resolution of Δg/g = 2 × 10−8 after a single 1.3 s measurement cycle was built.
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