Entanglement Witness for the Weak Equivalence Principle by Sougato Bose, Anupam Mazumdar, Martine Schut, Marko Toroš

“…We argue that such a quantum protocol is unique with regard to testing especially the generalisation of the weak equivalence principle by constraining the equality of gravitational and inertial mass via witnessing quantum entanglement.…”
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Weak equivalence principle violation for mixed scalar particles by Massimo Blasone, Petr Jizba, Gaetano Lambiase, Luciano Petruzziello

“…This, in turn, implies a violation of the weak equivalence principle. Finally, we prove that the Bargmann’s superselection rule, which prohibits oscillating particles on the basis of the Galilean transformation, is incompatible with the non-relativistic limit of the Lorentz transformation and hence does not collide with the results obtained.…”
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Testing weak equivalence principle with strongly lensed cosmic transients by H. Yu, F. Y. Wang

“…Abstract Current constraints on Einstein’s weak equivalence principle (WEP) utilize the observed time delay between correlated particles of astronomical sources. …”
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Correlative methods for dual-species quantum tests of the weak equivalence principle by B Barrett, L Antoni-Micollier, L Chichet, B Battelier, P-A Gominet, A Bertoldi, P Bouyer, A Landragin

“…In this work, we describe and demonstrate two new methods for extracting the differential phase between dual-species atom interferometers for precise tests of the weak equivalence principle (WEP). The first method is a generalized Bayesian analysis, which uses knowledge of the system noise to estimate the differential phase based on a statistical model. …”
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Analysis of the timing of freely falling antihydrogen by Olivier Rousselle, Pierre Cladé, Saïda Guellati-Khelifa, Romain Guérout, Serge Reynaud

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Current Status and Prospects on High-Precision Quantum Tests of the Weak Equivalence Principle with Cold Atom Interferometry by Liang Yuan, Jizhou Wu, Sheng-Jun Yang

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THE SOCCER-BALL PROBLEM IN QUANTUM SPACE by KHRYSTYNA P. GNATENKO, VOLODYMYR M. TKACHUK

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Low Energy Antimatter Physics by Marco Giammarchi, Giuseppe Vinelli

“…We will review the motivations and the general features of experiments devoted to testing fundamental laws with antimatter at low energies, namely the study of CPT invariance and the Weak Equivalence Principle. A summary of the recent experimental results will be presented.…”
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Clarifying possible misconceptions in the foundations of general relativity by Brown, H, Read, J

“…We discuss what we take to be three possible misconceptions in the foundations of general relativity, relating to: (a) the interpretation of the weak equivalence principle and the relationship between gravity and inertia; (b) the connection between gravitational redshift results and spacetime curvature; and (c) the Einstein equivalence principle and the ability to “transform away” gravity in local inertial coordinate systems.…”

Non-Minimal Lorentz Violation in Macroscopic Matter by Matthew Mewes

“…The framework is applied to free-fall and torsion-balance tests of the weak equivalence principle and to orbital motion. The effects on continuous media are studied, and the frequency shifts in acoustic resonators are calculated.…”
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Equivalence Principle in Classical and Quantum Gravity by Nikola Paunković, Marko Vojinović

“…We give a general overview of various flavours of the equivalence principle in classical and quantum physics, with special emphasis on the so-called weak equivalence principle, and contrast its validity in mechanics versus field theory. …”
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Sagnac effect and EMF in heavy-electron materials: Revisitation of Coriolis force and Euler force by Zhong-Yue Wang

“…The aim of this paper is to study its “gravitational mass” mG and test the weak equivalence principle (WEP) mi=mG in condensed matter physics. …”
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Systematic errors in high-precision gravity measurements by light-pulse atom interferometry on the ground and in space by Anna M. Nobili, Alberto Anselmi, Raffaello Pegna

“…When atom interferometers test the universality of free fall and the weak equivalence principle by dropping different isotopes of the same atom, one laser interrogates both isotopes and the error reported here cancels out. …”
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Constraints on equivalence principle violation from gamma ray bursts by Bartlett, DJ, Bergsdal, D, Desmond, H, Ferreira, PG, Jasche, J

“…Theories of gravity that obey the Weak Equivalence Principle have the same Parametrised Post-Newtonian parameter $\gamma$ for all particles at all energies. …”

TDiff in the dark: gravity with a scalar field invariant under transverse diffeomorphisms by Darío Jaramillo-Garrido, Antonio L. Maroto, Prado Martín-Moruno

“…This possibility is particularly interesting for the dark sector, where no restrictions arise based on the weak equivalence principle. In order to implement this idea we consider a scalar field which couples to gravity minimally but via arbitrary functions of the metric determinant. …”
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A modified Michelson interferometer to measure sub-milliradian changes in angle by C. K. LeDesma, M. P. Ross, B. E. Daly, C. D. Hoyle, M. M. Mola

“…Modern short-range gravity experiments that seek to test the Newtonian inverse-square law or weak equivalence principle of general relativity typically involve measuring the minute variations in the twist angle of a torsion pendulum. …”
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Galaxy morphology rules out astrophysically relevant Hu-Sawicki f (R) gravity by Ferreira, P, Desmond, H

“…These forces produce observable signatures in galaxy morphology, caused by a violation of the weak equivalence principle due to a differential impact of screening among galaxies’ mass components. …”

A Bose-condensed, simultaneous dual-species Mach–Zehnder atom interferometer by C C N Kuhn, G D McDonald, K S Hardman, S Bennetts, P J Everitt, P A Altin, J E Debs, J D Close, N P Robins

“…A number of ambitious proposals for precise terrestrial and space based tests of the weak equivalence principle rely on such a system. This implementation utilizes hybrid magnetic-optical trapping to produce spatially overlapped condensates with a repetition rate of 20 s. …”
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The LARES 2 satellite, general relativity and fundamental physics by Ignazio Ciufolini, Antonio Paolozzi, Erricos C. Pavlis, John C. Ries, Richard Matzner, Claudio Paris, Emiliano Ortore, Vahe Gurzadyan, Roger Penrose

“…It will also test other aspects and principles of fundamental physics and general relativity, such as the weak equivalence principle at the foundation of viable gravitational theories. …”
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Dual atomic interferometry for differential inertial sensing by Li, Jianing

“…After a velocity selection stage, implementing a Mach-Zehnder interferometer with Bragg pulses operating at the magic-wavelength along the vertical axis, we conduct tests of the weak equivalence principle (WEP). The Eötvös ratio we found in our system stood at (1.8 ± 3.1) × 10−4, mainly limited by the finite temperature of the atomic cloud constraining the interrogation time. …”
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