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The efforts in this contribution consist in reassessing a modified Dirac equation that incorporates a $\gamma^0 \gamma_5$-Lorentz-symmetry violating (LSV) term induced as a Loop Quantum Gravity (LQG) effect. Originally, this equation has…

High Energy Physics - Theory · Physics 2024-09-19 João Paulo S. Melo , Mario J. Neves , Jefferson M. A. Paixão , José A. Helayël-Neto

The first-order gravity effects of Dirac wave functions are found from the inertial effects in the accelerated frames of reference. Derivations and discussions about Lense-Thirring effect and the gyrogravitational ratio for intrinsic spin…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Yi-Cheng Huang , Wei-Tou Ni

Measuring the effect of gravity on antimatter is a longstanding problem in physics that has significant implications for our understanding of the fundamental nature of the universe. Here, we present a technique to measure the gravitational…

Atomic Physics · Physics 2024-07-02 Boaz Raz , Gavriel Fleurov , Roi Holtzman , Nir Davidson , Eli Sarid

We focus on the secular changes of the orbital elements of a planet in the solar system, determined by the magnetic-like part of a gravitational wave field. Using Fermi coordinates we show that the total force acting on a test particle is…

General Relativity and Quantum Cosmology · Physics 2021-10-12 Lorenzo Iorio , Matteo Luca Ruggiero

We investigate the gravitational effects on the relativistic Dirac theory of a system such as a Hydrogen atom in the braneworld scenario. A gravitational dipole moment like contribution, arises in the nonrelativistic Hamiltonian of the…

General Relativity and Quantum Cosmology · Physics 2025-01-22 Eugênio Bastos Maciel , M. A. Anacleto , E. Passos

We study electroweakly interacting particles in rotating matter. The existence of the electric current along the axis of the matter rotation is predicted in this system. This new galvano-rotational effect is caused by the parity violating…

High Energy Physics - Phenomenology · Physics 2015-05-22 Maxim Dvornikov

The gyromagnetic factor is an important physical quantity relating the magnetic-dipole moment of a particle to its spin. The electron spin g-factor in vacuo is one of the best model-based theoretical predictions ever made, showing agreement…

Strongly Correlated Electrons · Physics 2017-07-05 N. Menezes , Van Sergio Alves , E. C. Marino , L. Nascimento , Leandro O. Nascimento , C. Morais Smith

We determine the gyromagnetic factor of the positronium ion, a three-body system consisting of two electrons and a positron, including first relativistic corrections. We find that the g-factor is modified by a term -0.51(1)alpha^2,…

High Energy Physics - Phenomenology · Physics 2015-06-19 Yi Liang , Paul L. McGrath , Andrzej Czarnecki

The deflection of gamma-rays in Earth's gravitational field is tested in laser Compton scattering at high energy accelerators. Within a formalism connecting the bending angle to the photon's momentum it follows that detected gamma-ray…

General Physics · Physics 2022-06-30 Vahagn Gharibyan

The influence od space-time curvature on quantum matter which can be theoretically described by covariant wave equations has not been experimentally established yet. In this paper we analyse in detail the suitability of the Ramsey atom beam…

General Relativity and Quantum Cosmology · Physics 2009-10-22 Jürgen Audretsch , Karl-Peter Marzlin

The gravitational acceleration of antimatter, $\bar g$, has yet to be directly measured but could change our understanding of gravity, the Universe, and the possibility of a fifth force. Three avenues are apparent for such a measurement:…

As known from Einstein's theory of general relativity, the propagation of light in the presence of a massive object is affected by gravity. In this work, we discuss whether the effect of gravitational light bending can be observed in…

General Relativity and Quantum Cosmology · Physics 2020-07-13 Sebastian Ulbricht , Johannes Dickmann , Robert A. Müller , Stefanie Kroker , Andrey Surzhykov

The electron mass in atomic mass units has been determined with a relative uncertainty of $2.8\cdot 10^{-11}$, which represents a 13-fold improvement of the 2010 CODATA value. The underlying measurement principle combines a high-precision…

Atomic Physics · Physics 2016-04-18 Florian Köhler , Sven Sturm , Anke Kracke , Günter Werth , Wolfgang Quint , Klaus Blaum

This work relates to the famous experiments, performed in 1975 and 1979 by Werner et al., measuring neutron interference and neutron Sagnac effects in the earth's gravitational field. Employing the method of Stodolsky in its weak field…

General Relativity and Quantum Cosmology · Physics 2017-06-28 Andrei Galiautdinov , Lewis H. Ryder

The Zeeman effect describes the energy change of an atomic quantum state in magnetic field. The magnitude and the direction of this change depend on the dimensionless Lande g-factor. In quantum solids, the response of the Bloch electron…

Strongly Correlated Electrons · Physics 2022-08-26 Hong Li , He Zhao , Kun Jiang , Qi Wang , Qiangwei Yin , Ning-Ning Zhao , Kai Liu , Ziqiang Wang , Hechang Lei , Ilija Zeljkovic

We analyze orbital effects of an in-plane magnetic field on the spin structure of states of a gated quantum dot based in a two-dimensional electron gas. Starting with a $k \cdot p$ Hamiltonian, we perturbatively calculate these effects for…

Mesoscale and Nanoscale Physics · Physics 2018-12-05 Peter Stano , Chen-Hsuan Hsu , Marcel Serina , Leon C. Camenzind , Dominik M. Zumbühl , Daniel Loss

It was demonstrated (gr-qc/9910036) that the gravitational and inertial masses are correlated by an adimensional factor, which depends on the incident (or emitted)radiation upon the particle. There is a direct correlation between the…

General Physics · Physics 2010-06-11 Fran De Aquino

We study binding corrections to the gyromagnetic factor g_e of an electron in hydrogen-like ions. We argue that the leading order binding effects in radiative corrections Delta g_rad are universal to all orders in alpha/pi and the complete…

High Energy Physics - Phenomenology · Physics 2009-10-31 Andrzej Czarnecki , Kirill Melnikov , Alexander Yelkhovsky

We present an experimental procedure, based on Meissner effect levitation of neodymium ferromagnets, as a method of measuring the gravitational interactions between mg masses. The scheme consists of two superconducting lead traps, with a…

General Relativity and Quantum Cosmology · Physics 2021-11-17 Chris Timberlake , Andrea Vinante , Francesco Shankar , Andrea Lapi , Hendrik Ulbricht

We study the effect of gravity on stability of an electron living on the 3-brane. Our recently proposed fermion self-energy model is augmented by the energy of self-gravitating electron. This energy is evaluated using the gravitational…

General Relativity and Quantum Cosmology · Physics 2015-06-10 Eugen Simanek