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General Relativity and Quantum Cosmology papers — page 39

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Bosonic and fermionic statistics in nonperturbative quantum gravity
The relation between spin and statistics in quantum field theory relies on Poincaré invariance, a symmetry that is lost in the presence of a gravitational field, and replaced in general relativity by…
Bekir Baytaş, Patrick L. Rodrigues, Nelson YokomizoJul 29, 2026
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The Sequential Monte Carlo goes NUTS: Boosting Gravitational-Wave Inference
Sequential Monte Carlo (SMC) methods have recently been applied to gravitational-wave inference as a powerful alternative to standard sampling techniques, such as Nested Sampling. At the same time,…
Gabriele Demasi, Giulia Capurri, Massimo Lenti et al.Jul 29, 2026
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Differentiability and Other Properties of the Cosmological Volume Function
In a previous work, the regular cosmological volume function τV was introduced as an alternative to the regular cosmological time function of Andersson, Galloway, and Howard. Building on work by…
Leonardo García-HevelingJul 29, 2026
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Bayesian and Machine-Learning Analyses of Nonminimal f(Q) Gravity and H0 Tension
In this study, the cosmological implications of nonminimally coupled f(Q) gravity are examined within the metric-affine formalism, in which the nonmetricity scalar Q couples directly to the…
Simran Arora, Mridul PatelJul 29, 2026
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No-go theorems for pointwise-defined spinorial quantum fields
We extend and strengthen no-go results on pointwise-defined quantum fields to cover general spinors. We show that the weak continuity of quantum fields rules out equal-time canonical conjugate…
Samuel FedidaJul 29, 2026
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Removing spurious degrees of freedom from EFT of gravity
In the effective field theory approach to gravity, the Lagrangian density for general relativity is supplemented by generally covariant terms of higher order in the Riemann tensor and its…
Dražen Glavan, Shinji Mukohyama, Tom ZlosnikJul 29, 2026
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Sudden cosmological singularities in Aether scalar-tensor theories
In this work we analyze the possibility of sudden cosmological singularities, also known as type-II singularities, in the background of a Friedmann-Lemaître-Robertson-Walker (FLRW) geometry in an…
João Luís Rosa, Tom ZlosnikJul 29, 2026
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Dynamical system analysis of cosmological evolution in the Aether scalar tensor theory
The Aether Scalar Tensor (AeST) theory is an extension of General Relativity (GR), proposed for addressing galactic and cosmological observations without dark matter.The action for the theory…
João Luís Rosa, Tom ZlosnikJul 29, 2026
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Paths to gravitation via the gauging of parameterized field theories
In special-relativistic physics, spacetime is imbued with a fixed, non-dynamical metric tensor. A path to gravitational theory is to promote this tensor to a genuine dynamical field. An alternative…
Tomi S Koivisto, Tom ZlosnikJul 29, 2026
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Fermionic Backreaction on Quantum Spacetimes: Cosmological Implications
This article reviews a Hamiltonian framework for describing Dirac fermions propagating on quantum cosmological spacetimes within loop quantum cosmology. Expanding the fermionic field in spinor…
Y. Tavakoli, A. Khaleghi Ardabili, S. MosaddeghJul 28, 2026
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Light propagation and intensity transport in metric-affine geometry
We study electromagnetic wave propagation in metric--affine geometries, where torsion and non-metricity may be present and the coupling between electromagnetism and spacetime is no longer unique.…
Antonio De Felice, Lavinia Heisenberg, Gonzalo J. Olmo et al.Jul 28, 2026
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Cosmological consequences of scale-dependent Barrow-Tsallis entropy
We investigate an extended cosmological scenario based on the Barrow-Tsallis entropy, incorporating a varying (i.e., energy-scale-dependent) anomalous dimension. This behavior is reminiscent of…
Giuseppe Gaetano Luciano, Orlando Luongo, Marco MuccinoJul 28, 2026
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A rigid spherical shell enclosing a degenerate wormhole
A static configuration consisting of a rigid spherical shell enclosing a degenerate Schwarzschild Klinkhamer wormhole is investigated in general relativity. The shell is analyzed using the Israel…
Juri DimaschkoJul 28, 2026
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Early- and late-time constraints on Wald-Gauss-Bonnet topological dark energy and implications for the H0 and S8 tensions
The persistent H0 and S8 tensions motivate the search for new dark-energy mechanisms capable of modifying the late-time expansion history while preserving the successful early-Universe…
Stylianos A. Tsilioukas, Fotios K. Anagnostopoulos, Spyros Basilakos et al.Jul 28, 2026
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Quantum Gravity from Fractal Entanglement Geometry
In this paper we propose that spacetime is an emergent fractal geometry generated by the entanglement structure of an underlying quantum information network. Indeed, it is developed a framework in…
Jaume GineJul 28, 2026
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Causal Green function decomposition for quantum black hole seismology
The growing sensitivity of gravitational-wave detectors enables increasingly precise tests of black hole (BH) ringdown spectroscopy. BH quasinormal modes (QNMs) are, however, spectrally unstable:…
Xi-Li Zhang, Jing RenJul 28, 2026
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Analytic backreaction of a scalar wig on a Schwarzschild black hole
We analytically determine the leading backreaction of a spherically symmetric massive complex scalar quasi-bound state (with mass μ) on a Schwarzschild black hole with (initial) gravitational…
Marco de Cesare, Manuel Del Piano, Carlos A. R. HerdeiroJul 28, 2026
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General Relativistic Entropic Acceleration at the perturbation level: a CLASS implementation and first Boltzmann-code constraints
General Relativistic Entropic Acceleration (GREA) attributes the late-time acceleration of the Universe to the entropy growth of the causal cosmological horizon, without a cosmological constant, with…
Simone D'Onofrio, Dong Ha Lee, Eleonora Di Valentino et al.Jul 28, 2026
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Echoes and quasinormal modes for static loop quantum black bounces
We investigate scalar perturbations of the static loop quantum black bounce (LQBB) spacetime with multipole index l=1, focusing on time-domain signals and fundamental quasinormal frequencies…
Huajie Gong, Guoyang Fu, Shulan Li et al.Jul 28, 2026
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Taub-NUT as gravitational dyon with torsion
We show that the Levi-Civita connection for the Taub-NUT metric is singular on Misner strings and generates an Einstein tensor containing the squares of the delta function. This can be improved by…
Dmitri Gal'tsov, Rostom KarsanovJul 28, 2026
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Conserved Gravitational Charges as Curvature Fluxes
Conserved gravitational charges are commonly expressed as surface integrals of the metric perturbation and its first derivatives. We show that, in the usual asymptotically AdS and asymptotically flat…
Emel Altas, Bayram TekinJul 28, 2026
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Spin precession in the strong deflection limit
The strong deflection limit (SDL) of the deflection angle is well established for general spherically symmetric spacetimes, but a systematic SDL treatment of spin precession has been lacking. We…
Jiafei Geng, Yunchuan Xiang, Qingquan Jiang et al.Jul 28, 2026
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Gravitational wave constraints on corrections to Bekenstein-Hawking Area Formula in classical F(R) gravity and quantum GR : implications for theory parameters
This contribution considers constraints from analyses of gravitational wave data from binary black hole coalescence, on possible corrections to the Bekenstein-Hawking Area Formula for black hole…
Parthasarathi MajumdarJul 28, 2026
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Gravitational Baryogenesis in Rainbow Gauss-Bonnet gravity
The gravitational baryogenesis is studied in regularized four dimensional Einstein Gauss Bonnet model with rainbow gravity corrections. This combined framework generates a non vanishing time…
P. Goodarzi, H. Mohseni Sadjadi, R. DarabiJul 28, 2026
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Memory Effect for deformed gravitational waves
Deformations of sandwich gravitational waves are considered. Squeezing a wave with pure displacement (DM) parameters to an impulsive wave, the DM property is lost, leaving us with the velocity effect…
P. -M. Zhang, M. Elbistan, P. A. HorvathyJul 28, 2026
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