Results 61 to 70 of about 50,468 (222)

Energy Symmetry Breaking of Dirac and Weyl Fermions in Magnetized Spinning Conical Geometries

Advanced Theory and Simulations, Volume 8, Issue 10, October 2025.
Exact solutions for relativistic fermions in magnetized, spinning conical geometries reveal defect‐induced symmetry breaking between fermion and antifermion energies. Energy levels depend on the magnetic field, background geometry, and fractionalized spin. When the defect's spin dominates, quantum effects diminish.
Abdullah Guvendi, Omar Mustafa
wiley   +1 more source

Quantum Gravity: General Introduction and Recent Developments

, 2005
I briefly review the current status of quantum gravity. After giving some general motivations for the need of such a theory, I discuss the main approaches in quantizing general relativity: Covariant approaches (perturbation theory, effective theory, and ...
Aharony, Amati, Ashtekar, Barbour, Bjerrum-Bohr, Blais, Bojowald, Borde, Brunnemann, Carlip, Carr, Coule, D'Eath, de Calan, Demers, Domagala, Goroff, Grøn, Halliwell, Hartle, Hawking, Hawking, Horowitz, Husain, Hájíček, Isham, Joos, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kiefer, Kimberly, Lauscher, Lin, Lämmerzahl, Majid, Meissner, Myers, Nicolai, Ooguri, Ooguri, Page, Polchinski, Reuter, Reuter, rn, Rosenfeld, Rovelli, Rovelli, Shepard, Thiemann, Weinberg, Wiltshire, Witten, Zeh, Zeh   +59 more
core   +1 more source

Combining general relativity and quantum theory: points of conflict and contact [PDF]

, 2001
The issues related to bringing together the principles of general relativity and quantum theory are discussed. After briefly summarising the points of conflict between the two formalisms I focus on four specific themes in which some contact has been ...
Bekenstein J D, Bojowald M, Carlip S, Hawking S W, Horowitz G, Padmanabhan T, Padmanabhan T, Padmanabhan T, Padmanabhan T, Padmanabhan T, Padmanabhan T, Sakharov A D, Singh T P, Sorkin D, T Padmanabhan, Wheeler J A, Witten E   +16 more
core   +2 more sources

Unification of Conformal and Fuzzy Gravities With Internal Interactions Resulting in SO(10) and a Possible Probe Through Stochastic Gravitational Wave Background

Fortschritte der Physik, Volume 73, Issue 9-10, October 2025.
Abstract The unification of conformal and fuzzy gravities with internal interactions is based on the facts that i) the tangent group of a curved manifold and the manifold itself do not necessarily have the same dimensions and ii) both gravitational theories considered here have been formulated in a gauge theoretic way.
Gregory Patellis, Danai Roumelioti, Stelios Stefas, George Zoupanos   +3 more
wiley   +1 more source

Einstein, Planck and Vera Rubin: Relevant Encounters Between the Cosmological and the Quantum Worlds

Frontiers in Physics, 2021
In Cosmology and in Fundamental Physics there is a crucial question like: where the elusive substance that we call Dark Matter is hidden in the Universe and what is it made of?
Paolo Salucci, Giampiero Esposito, Gaetano Lambiase, Emmanuele Battista, Emmanuele Battista, Emmanuele Battista, Micol Benetti, Micol Benetti, Donato Bini, Donato Bini, Lumen Boco, Gauri Sharma, Valerio Bozza, Luca Buoninfante, Antonio Capolupo, Salvatore Capozziello, Salvatore Capozziello, Giovanni Covone, Giovanni Covone, Rocco D’Agostino, Rocco D’Agostino, Mariafelicia De Laurentis, Mariafelicia De Laurentis, Ivan De Martino, Ivan De Martino, Giulia De Somma, Giulia De Somma, Elisabetta Di Grezia, Chiara Di Paolo, Lorenzo Fatibene, Viviana Gammaldi, Andrea Geralico, Andrea Geralico, Lorenzo Ingoglia, Andrea Lapi, Giuseppe G. Luciano, Leonardo Mastrototaro, Adele Naddeo, Lara Pantoni, Luciano Petruzziello, Luciano Petruzziello, Ester Piedipalumbo, Ester Piedipalumbo, Silvia Pietroni, Aniello Quaranta, Paolo Rota, Giuseppe Sarracino, Francesco Sorge, Antonio Stabile, Cosimo Stornaiolo, Antonio Tedesco, Riccardo Valdarnini, Stefano Viaggiu, Stefano Viaggiu, Andy A. V. Yunge   +54 more
doaj   +1 more source

Probing the Black Hole Interior with Holographic Entanglement Entropy and the Role of AdS/BCFT Correspondence

Fortschritte der Physik, Volume 73, Issue 9-10, October 2025.
The present work, entitled: Probing the Black Hole Interior with Holographic Entanglement Entropy and the Role of AdS/BCFT Correspondence by Fabiano F. Santos, is presented as an investigation of the black hole interior using the Holographic Entanglement Entropy (HEE) and AdS/BCFT Correspondence.
Fabiano F. Santos
wiley   +1 more source

A Wheeler–DeWitt Quantum Approach to the Branch-Cut Gravitation with Ordering Parameters

Universe, 2023
In this contribution to the Festschrift for Prof. Remo Ruffini, we investigate a formulation of quantum gravity using the Hořava–Lifshitz theory of gravity, which is General Relativity augmented by counter-terms to render the theory regularized.
Benno August Ludwig Bodmann, César Augusto Zen Vasconcellos, Peter Otto Hess Bechstedt, José Antonio de Freitas Pacheco, Dimiter Hadjimichef, Moisés Razeira, Gervásio Annes Degrazia   +6 more
doaj   +1 more source

Gauge invariance in Loop Quantum Cosmology : Hamilton-Jacobi and Mukhanov-Sasaki equations for scalar perturbations

, 2011
Gauge invariance of scalar perturbations is studied together with the associated equations of motion. Extending methods developed in the framework of hamiltonian General Relativity, the Hamilton-Jacobi equation is investigated into the details in Loop ...
Barrau, Aurelien, Cailleteau, Thomas
core   +3 more sources

New Fit for the O+‐O Collision Frequency Including Fine Structure Effects

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract A new fit is presented for the oxygen ion‐neutral collision frequency νin ${\nu }_{\text{in}}$. The fit explicitly depends on the neutral temperature Tn ${T}_{\mathrm{n}}$, which characterizes the thermal distribution of fine structure levels of O(3PJ,J=0 ${P}_{J},\,J=0$,1,2), and the reduced temperature Tr=12Tn+Ti ${T}_{\mathrm{r}}=\frac{1}{2}
A. P. Hickman
wiley   +1 more source

Ultraviolet Photooxidation of Carbonate‐Bearing Aqueous Ferrous Iron Within Open and Closed Experimental Systems—Implications for Sunlit Surface Water Bodies on Early Mars

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract Ultraviolet (UV) photooxidation has been considered a viable pathway to oxidize aqueous ferrous iron expected to have been present in early Martian surface waters. This reaction has been proposed to have created iron mineral deposits in Meridiani Planum as well as Gale Crater and would have affected chemical conditions such as pH and dissolved
V. B. Rivera Banuchi, J. A. Hurowitz
wiley   +1 more source