Results 51 to 60 of about 74,681 (258)

Coordinate‐ and Spacetime‐Independent Quantum Physics

Annalen der Physik, Volume 538, Issue 1, January 2026.
This article studies in the framework of quantum field theory in curved spacetime, if there exists a single zero‐rank‐tensor solution of a Klein‐Gordon PDE, being valid at once for the depicted spacetimes. The answer is shown to be affirmative, even for a class of such solutions having the standard applications in particle physics. ABSTRACT The concept
Viacheslav A. Emelyanov, Daniel Robertz
wiley   +1 more source

Cosmology from Newton–Chern–Simons gravity

Nuclear Physics B, 2020
We study a five-dimensional non-relativistic gravity theory whose action is composed of a gravitational sector and a sector of matter where the gravitational sector is given by the so called Newton–Chern–Simons gravity and where the matter sector is ...
S. Lepe, G. Rubio, P. Salgado
doaj   +1 more source

Late Decaying Dark Matter, Bulk Viscosity and the Cosmic Acceleration

, 2008
We discuss a cosmology in which cold dark matter begins to decay into relativistic particles at a recent epoch (z < 1). We show that the large entropy production and associated bulk viscosity from such decays leads to an accelerating cosmology as ...
A. G. Doroshkevich, A. G. Doroshkevich, C. Kolda, G. Gilmore, G. J. Mathews, G. W. Anderson, L. D. Landau, L. H. Thomas, M. Yu. Khlopov, N. Q. Lan, R. D. Peccei, S. Weinberg   +11 more
core   +1 more source

An exact quantification of backreaction in relativistic cosmology [PDF]

, 2012
An important open question in cosmology is the degree to which the Friedmann-Lemaitre-Robertson-Walker (FLRW) solutions of Einstein's equations are able to model the large-scale behaviour of the locally inhomogeneous observable universe.
G. F. R. Ellis, H. M. S. Coxeter, K. O’Donnell, Kjell Rosquist, R. M. Wald, R. M. Zalaletdinov, Reza Tavakol, T. Buchert, Timothy Clifton   +8 more
core   +2 more sources

Quantum GraviElectro Dynamics

Annalen der Physik, Volume 538, Issue 1, January 2026.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

Cosmic Evolution of Viscous QCD Epoch in Causal Eckart Frame

Universe, 2021
It is conjectured that in cosmological applications the particle current is not modified but finite heat or energy flow. Therefore, comoving Eckart frame is a suitable choice, as it merely ceases the charge and particle diffusion and conserves charges ...
Eman Abdel Hakk, Abdel Nasser Tawfik, Afaf Nada, Hayam Yassin   +3 more
doaj   +1 more source

Non-equilibrium field theory [PDF]

, 2000
I discuss various topics in relativistic non-equilibrium field theory related to high energy physics and cosmology. I focus on non-perturbative problems and how they can be treated on the lattice.Comment: Plenary talk given at the 18th International ...
Aarts, Aarts, Aarts, Ambjorn, Ambjorn, Ambjørn, Ambjørn, Arnold, Arnold, Arnold, Arnold, Arnold, Arnold, Blaizot, Blaizot, Blaizot, Bochkarev, Borsanyi, Boyanovsky, Braaten, Braaten, Bödeker, Bödeker, Bödeker, Bödeker, Bödeker, Bödeker, Bödeker, Cohen, Cooper, Dietrich Bödeker, Felder, Fodor, Frenkel, Grigoriev, Grigoriev, Gross, Hu, Huet, Jeon, Jeon, Kasuya, Kasuya, Khlebnikov, Khlebnikov, Kofman, Kovner, Krasnitz, Krasnitz, Kripfganz, Langer, Lifshitz, Linde, Litim, McLerran, McLerran, Moore, Moore, Moore, Moore, Nair, Nieto, Prokopec, Rajantie, Riotto, Rubakov, Tang, Tang, Taylor, Wang, Wetterich   +70 more
core   +3 more sources

Cosmological dynamics of relativistic MOND

Journal of Cosmology and Astroparticle Physics, 2022
Abstract In this paper, we investigate the recently proposed relativistic theory for MOND using phase space analysis. Unlike its precedent theory, namely TeVeS, this theory is claimed to agree with the observed Cosmic Microwave Background and matter power spectra. We convert the background cosmological equations of the theory to a set of
Kashfi, Tahere, Roshan, Mahmood
openaire   +2 more sources

Logarithmic and Strong Coupling Models in Weyl‐Type f(Q,T)$f(Q,T)$ Gravity

Annalen der Physik, Volume 538, Issue 1, January 2026.
This work explores Weyl‐type f(Q,T) gravity using recent observational datasets — CC, Pantheon+, Union 3.0, and DESI DR2. Through MCMC analysis of logarithmic and strong coupling models, the study reveals a transition from deceleration to acceleration, quintessence‐to‐phantom dynamics, and late‐time consistency with LCDM, offering a geometry‐driven ...
Rahul Bhagat, S. K. Tripathy, B. Mishra
wiley   +1 more source

The ΛCDM-NG Cosmological Model: A Possible Resolution of the Hubble Tension

The Astrophysical Journal
We offer a cosmological model based on conventional general relativity (no speculative physics) that may resolve the Hubble tension. A reanalysis of the foundation of the Lambda-CDM model shows that general relativity alone does not specify what fraction
Richard J. Cook
doaj   +1 more source