Tootfinder

Constraining Cubic Curvature Corrections to General Relativity with Quasi-Periodic Oscillations
Alireza Allahyari, Liang Ma, Shinji Mukohyama, Yi Pang
https://arxiv.org/abs/2506.22548

Constraining Cubic Curvature Corrections to General Relativity with Quasi-Periodic Oscillations
We investigate observational constraints on cubic curvature corrections to general relativity by analyzing quasi-periodic oscillations (QPOs) in accreting black hole systems. In particular, we study Kerr black hole solution corrected by cubic curvature terms parameterized by $β_5$ and $β_6$. While $β_6$ corresponds to a field-redefinition invariant structure, the $β_5$ term can in principle be removed via a field redefinition. Nonetheless, since we work in the frame where the accreting matt…

Revisiting Coincident GR in Internal STEGR Formulation
Kyosuke Tomonari, Taishi Katsuragawa, Shin'ichi Nojiri
https://arxiv.org/abs/2506.22158 https://…

Revisiting Coincident GR in Internal STEGR Formulation
We revisit Coincident General Relativity (CGR) in the gauge approach to gravity based on Symmetric Teleparallel Equivalent to General Relativity (STEGR) in the {\it internal-space formulation}, which one of the authors recently proposed in Ref.~[J. Math. Phys. 66 (2025) 5, 052505]. First, we review the standard formulation of STEGR theories in the Palatini approach to gravity, in which formulation we impose the teleparallel and torsion-free conditions by using Lagrange multipliers. Second, we i…

A little more than 30 years ago, I learned basic general relativity in physics. I couldn't really understand time. It just seemed like there was something that was missing.
I developed an idea of how time and space should be described, but I never managed to explain it to anyone in an understandable way.
After recently watching Sabine Hossenfelder tear down a paper with a similar idea (

Analogy of space-time as an elastic medium -- Study of the perturbation tensor of the metric $h_{\mu\nu}$ through the prism of the analogy of the theory of elasticity -- Analysis and potential consequences
David Izabel, Yves Remond, Matteo Lucas Ruggiero
https://arxiv.org/abs/2506.21984 …

Analogy of space-time as an elastic medium -- Study of the perturbation tensor of the metric $h_{μν}$ through the prism of the analogy of the theory of elasticity -- Analysis and potential consequences
A state of the art of the different deformations of space-time measured for more than a hundred years in the case of general relativity in the weak field is carried out. The phenomena of general relativity in low fields targeted are gravitational waves, Lense-thirring effects, gravitational lensing, gravitation around the earth or the sun. The overview of these different deformations highlights the different active components of the perturbation tensor of the metric $h_{μν}$. The authors show…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Exploring modified Kaniadakis entropy: MOND-related theory, the Bekenstein bound conjecture, and ...
Ambr\'osio, Andrade, Alves, Costa, Neto, Thibes

[2025-06-30 Mon (UTC), 14 new articles found for gr-qc General Relativity and Quantum Cosmology]
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[2025-07-01 Tue (UTC), 13 new articles found for gr-qc General Relativity and Quantum Cosmology]
toXiv_bot_toot

Pseudo-Complex Gravity as a Geometric Resolution of the Black Hole Information Paradox
Fridolin Weberand Peter O. Hess, Cesar A. Zen Vasconcellos
https://arxiv.org/abs/2506.21761 …

Pseudo-Complex Gravity as a Geometric Resolution of the Black Hole Information Paradox
We investigate the black hole information paradox in the setting of pseudo-complex gravity, a covariant geometric extension of general relativity that introduces a minimal length scale by deforming the spacetime manifold. In this framework, curvature invariants stay finite, and the classical singularity is geometrically regularized via a smooth core. We show that the correction term B/(6r**4) alters the Schwarzschild metric, generating the regularized geometry above, yielding a finite Hawking t…

Binary black holes in the heat of merger
Samanwaya Mukherjee, Sayak Datta, Sukanta Bose, Khun Sang Phukon
https://arxiv.org/abs/2506.22363 https://

Binary black holes in the heat of merger
A black hole binary approaching merger undergoes changes in its inspiral rate as energy and angular momentum are lost from the orbits into the horizons. This effect strengthens as the black holes come closer. We use numerical relativity data to model this so-called tidal heating in the strong gravity regime. We present a frequency-domain approximant for nonspinning black hole binaries that accounts for tidal heating effects up to the merger frequency. The approximant includes horizon parameters…

Waging a Campaign: Results from an Injection-Recovery Study involving 35 numerical Relativity Simulations and three Waveform Models
Sarp Ak\c{c}ay, Charlie Hoy, Jake Mac Uilliam
https://arxiv.org/abs/2506.19990

Waging a Campaign: Results from an Injection-Recovery Study involving 35 numerical Relativity Simulations and three Waveform Models
We present Bayesian inference results from an extensive injection-recovery campaign to test the validity of three state of the art quasicircular gravitational waveform models: \textsc{SEOBNRv5PHM}, \textsc{IMRPhenomTPHM}, \textsc{IMRPhenomXPHM}, the latter with the \textsc{SpinTaylorT4} implementation for its precession dynamics. We analyze 35 strongly precessing binary black hole numerical relativity simulations with all available harmonic content. Ten simulations have a mass ratio of $4:1$ an…