Tootfinder

Quasinormal modes from numerical relativity with Bayesian inference
Richard Dyer, Christopher J. Moore
https://arxiv.org/abs/2510.11783 https://arxiv.org/p…

Quasinormal modes from numerical relativity with Bayesian inference
Numerical relativity (NR) enables the study of physics in strong and dynamical gravitational fields and provides predictions for the gravitational-wave signals produced by merging black holes. Despite the impressive accuracy of modern codes, the resulting waveforms inevitably contain numerical uncertainties. Quantifying these uncertainties is important, especially for studies probing subdominant or nonlinear effects around the merger and ringdown. This paper describes a flexible Gaussian-proces…

The double neutron star PSR J1946 2052 I. Masses and tests of general relativity
Lingqi Meng, Paulo C. C. Freire, Kevin Stovall, Norbert Wex, Xueli Miao, Weiwei Zhu, Michael Kramer, James M. Cordes, Huanchen Hu, Jinchen Jiang, Emilie Parent, Lijing Shao, Ingrid H. Stairs, Mengyao Xue, Adam Brazier, Fernando Camilo, David J. Champion, Shami Chatterjee, Fronefield Crawford, Ziyao Fang, Qiuyang Fu, Yanjun Guo, Jason W. T. Hessels, Maura MacLaughlin, Chenchen Miao, Jiarui Niu, Ziwei Wu, Ju…

The double neutron star PSR J1946+2052 I. Masses and tests of general relativity
We conducted high-precision timing of PSR J1946+2052 to determine the masses of the two neutron stars in the system, test general relativity (GR) and assessed the system's potential for future measurement of the moment of inertia of the pulsar. We analysed seven years of timing data from the Arecibo 305-m radio telescope, the Green Bank Telescope (GBT), and the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The data processing accounted for dispersion measure variations and relat…

Comment on Marek Czachor article entitled "On Relativity of Quantumness as Implied by Relativity of Arithmetic and Probability"
Krzysztof Sienicki, Miko{\l}aj Sienicki
https://arxiv.org/abs/2510.02412

Comment on Marek Czachor article entitled "On Relativity of Quantumness as Implied by Relativity of Arithmetic and Probability"
Czachor's model of hierarchical arithmetics begins with a valid formal premise but fixes the key probability mapping g by importing the Born rule and Fubini-Study metric from standard quantum mechanics, where Born probabilities are Kolmogorov within a fixed measurement context. This g is then applied in a non-Newtonian hidden-variable setting, producing a hybrid framework whose agreement with quantum correlations is built in by design, not derived from new physics, and thus does not constitute …

Black hole mergers beyond general relativity: a self-force approach
Ayush Roy, Lorenzo K\"uchler, Adam Pound, Rodrigo Panosso Macedo
https://arxiv.org/abs/2510.11793 https:…

Black hole mergers beyond general relativity: a self-force approach
Gravitational waves from binary black hole mergers provide a glimpse of gravitational dynamics in its most extreme observable regime, potentially enabling precision tests of general relativity (GR) and of the Kerr description of black holes. However, until recently, numerical simulations of black hole mergers have not been possible in theories beyond GR. While recent breakthroughs have overcome that obstacle, simulations covering the full, interesting range of binary parameters remain unfeasibl…

Emergence of General Relativity from Cosmological Constant Via Ghost Condensation
Ichiro Oda
https://arxiv.org/abs/2509.23648 https://arxiv.org/pdf/2509.23…

Emergence of General Relativity from Cosmological Constant Via Ghost Condensation
We show that starting with a cosmological constant in a curved space-time, the Einstein-Hilbert term of general relativity is generated through a ghost condensation. We fix Weyl symmetry, or equivalently local scale symmetry by a gauge condition $R = 0$ à la BRST formalism, and see that the condensation of the Faddeev-Popov ghosts, $\langle \bar c c \rangle \neq 0$ leads to a generation of the Einstein-Hilbert action of general relativity. This dynamical mechanism of symmetry breakdown for a g…

"Dr. Charles Misner, who passed away in 2023 at the age of 91, was a professor of physics at the University of Maryland from 1963 to 2000, and a renowned expert in General Relativity. He was the recipient of the Albert Einstein medal in 2015, and was the co-author of “Gravitation”, one of the best-selling books in the subject of General Relativity, featuring none other than Kip Thorne on the cover."

Charles Misner & Patrick Cooney
Given the pervasiveness and versatility of computers in our world of 2025 it is easy to ignore that 80 years ago they were initially conceived as what we would call today a calculator, specifically created to solve tedious mathematical problems. Of course, users of TikTok, Call of Duty, YouTube, Visual Studio Code, or even readers of this website through some web browser like Firefox are usually (and blissfully) unaware of the gazillion computations per second that it takes to produce everythin…

Physics is simple only when analyzed locally
Matteo Luca Ruggiero
https://arxiv.org/abs/2511.07447 https://arxiv.org/pdf/2511.07447 https://arxiv.org/html/2511.07447
arXiv:2511.07447v1 Announce Type: new
Abstract: The definition of a reference frame in General Relativity is achieved through the construction of a congruence of time-like world-lines. In this framework, splitting techniques enable us to express physical phenomena in analogy with Special Relativity, thereby realizing the local description in terms of Minkowski spacetime in accordance with the equivalence principle. This approach holds promise for elucidating the foundational principles of relativistic gravitational physics, as it illustrates how its 4-dimensional mathematical model manifests in practical measurement processes conducted in both space and time. In addition, we show how, within this framework, the Newtonian gravitational force naturally emerges as an effect of the non-geodesic path of the reference frame.
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On the Relativity of Quantumness as Implied by Relativity of Arithmetic and Probability
Marek Czachor
https://arxiv.org/abs/2510.00637 https://arxiv.org/pd…

On the Relativity of Quantumness as Implied by Relativity of Arithmetic and Probability
A hierarchical structure of isomorphic arithmetics is defined by a bijection $g_\mathbb{R}:\mathbb{R}\to \mathbb{R}$. It entails a hierarchy of probabilistic models, with probabilities $p_k=g^k(p)$, where $g$ is the restriction of $g_\mathbb{R}$ to the interval $[0,1]$, $g^k$ is the $k$th iterate of $g$, and $k$ is an arbitrary integer (positive, negative, or zero; $g^0(x)=x$). The relation between $p$ and $g^k(p)$, $k>0$, is analogous to the one between probability and neural activation functi…

Nothing hurts my head more than reading about time. https://mastodon.social/@h4ckernews/115688679152089280

Hybridization of second-order gravitational self-force and numerical relativity waveforms for quasi-circular and non-spinning black hole binaries
Hector Iglesias, Leanne Durkan, Deirdre Shoemaker
https://arxiv.org/abs/2510.11685

Hybridization of second-order gravitational self-force and numerical relativity waveforms for quasi-circular and non-spinning black hole binaries
In the past few decades, the waveform community has made advances in producing waveforms that span the inspiral-merger-ringdown of comparable-mass-ratio black hole binaries using advances in post-Newtonian and numerical relativity (NR) theory along with state-of-the-art gravitational wave models. Current methods in NR have shown progress towards producing stable simulations reaching mass ratios of 1:100; however, the computational cost becomes prohibitively expensive as the mass ratio and the l…

Comment on "Comment on Galina Weinstein's article entitled 'Convergences and Divergences: Einstein Poincar\'e and Special Relativity' "
Galina Weinstein
https://arxiv.org/abs/2510.03793

Comment on "Comment on Galina Weinstein's article entitled 'Convergences and Divergences: Einstein Poincaré and Special Relativity' "
This paper provides a systematic response to the criticisms raised by Jean-Marc Ginoux in response to my review of his book on the history of relativity. Whereas my review was written in a strictly academic manner, Ginoux's commentary intermingles mathematical objections with ad hominem insinuations about both Einstein and me. The purpose of this reply is twofold: first, to clarify the historiographical and conceptual issues at stake in the interpretation of Einstein's 1905 paper and Poincaré'…

Primordial Black Holes from Primordial Voids
Cristian Joana, Zi-Yan Yuwen
https://arxiv.org/abs/2510.11611 https://arxiv.org/pdf/2510.11611

Primordial Black Holes from Primordial Voids
Primordial black holes (PBHs) are a compelling dark matter candidate and a unique probe of small-scale cosmological fluctuations. Their formation is usually attributed to large positive curvature perturbations, which collapse upon Hubble re-entry during radiation domination. In this work we investigate instead the role of negative curvature perturbations, corresponding to the growth of primordial void (PV) like regions. Using numerical relativity simulations, we show that sufficiently deep PV c…

X-mas comes early this year: the ICFP 2025 talks are now on YouTube.
You can catch my talk on "Domain-specific tensor languages" below. We explore implementing tensor calculus in #Haskell, supporting both Einstein notation and Penrose diagrams to model things like General Relativity and black holes. 🕳️🚀
My talk:

Flipping particles with nodal circulations by general relativity under the presence of an inner perturber
Gonzalo Carlos de El\'ia, Macarena Zanardi, Carla Florencia Coronel, Agust\'in Dugaro
https://arxiv.org/abs/2509.19641

Flipping particles with nodal circulations by general relativity under the presence of an inner perturber
From a secular Hamiltonian up to the quadrupole level with general relativity (GR), we study nodal circulations with orbital flips of test particles of the Habitable Zone (HZ) around a solar-mass star, which are perturbed by an inner planetary-mass companion. Nodal circulations with orbital flips of an HZ test particle with eccentricity e2 are possible for any mass m1 and eccentricity e1 of the inner perturber and a suitable inclination i2. In particular, the greater the values of m1 and e2 , t…

Here is a note on a friend who died two weeks ago...
I will always carry the image of Joel wearing his Sherlock Holmes cap and short cape.
Joel spent many an hour explaining current cosmological theory to me. He explained general relativity at our dinner table and gave me a deep lesson in astrobiology during a trip to Aspen. I wish I had had more teachers like him.
In Memoriam: Joel Primack

In Memoriam: Joel Primack
Distinguished emeritus professor was a towering figure in theoretical physics and cosmology, a visionary educator, dedicated mentor, and passionate advocate for the role of science in society

Hidden zeros for higher-derivative YM and GR amplitudes at tree-level
Kang Zhou
https://arxiv.org/abs/2510.11070 https://arxiv.org/pdf/2510.11070

Hidden zeros for higher-derivative YM and GR amplitudes at tree-level
We extend the recently discovered phenomenon of hidden zeros to tree amplitudes for Yang-Mills (YM) and general relativity (GR) theories with higher-derivative interactions. This includes gluon amplitudes with a single insertion of the local $F^3$ operator, as well as graviton amplitudes at sub-leading and sub-sub-leading orders in the low-energy expansion of bosonic closed string amplitudes -- referred to as $R^2$ and $R^3$ amplitudes, respectively. The kinematic condition for hidden zeros lea…

On defining astronomically meaningful Reference Frames in General Relativity
L. Filipe O. Costa, Francisco Frutos-Alfaro, Jos\'e Nat\'ario, Michael Soffel
https://arxiv.org/abs/2510.07400

On defining astronomically meaningful Reference Frames in General Relativity
In a recent paper we discussed when it is possible to define reference frames nonrotating with respect to distant inertial reference objects (extension of the IAU reference systems to exact general relativity), and how to construct them. We briefly review the construction, illustrating it with further examples, and caution against the recent misuse of zero angular momentum observers (ZAMOs).

Accretion onto Reissner-Nordstr\"{o}m naked singularities
Tomasz Krajewski, W{\l}odek Klu\'zniak
https://arxiv.org/abs/2510.10043 https://arxiv.or…

Accretion onto Reissner-Nordström naked singularities
Nearly every galactic core contains a supermassive compact object, hypothesized to be a Kerr black hole. It was only with the advent of Event Horizon Telescope observations that the predictions of this hypothesis could be observationally tested for our own Galaxy, and the nearby elliptical M87, on spatial scales comparable to the gravitational radius. At the same time it became possible to test whether alternatives such as naked singularities in general relativity, or similar objects in alterna…

Comment on Galina Weinstein's article entitled "Convergences and Divergences: Einstein Poincar\'e and Special Relativity"
Jean-Marc Ginoux
https://arxiv.org/abs/2509.22726

Comment on Galina Weinstein's article entitled "Convergences and Divergences: Einstein Poincaré and Special Relativity"
In 2024, after thirty years of research on this subject, I published a book entitled: Poincaré, Einstein and the discovery of special relativity. An end to the controversy (Ginoux2024). In September 2025, Galina Weinstein published a review of this book entitled: Convergences and Divergences: Einstein Poincaré and Special Relativity (arXiv:2509.09361) in which she aimed "to show how Einstein's ether-free, principle-based kinematics marked out a path that, unlike its contemporaries, became the…

Gravitational wave echos from physical black holes
Yu-Song Cao, YanXia Liu, Ding-Fang Zeng
https://arxiv.org/abs/2510.11518 https://arxiv.org/pdf/2510.1151…

Gravitational wave echos from physical black holes
Gravitational wave echos from the coalescence of black hole binaries are often viewed as signals beyond general relativity or standard model. In this work, we show that these echos are inevitable in the black holes coalescence described by standard general relativity. This is because it is the physical black holes formed through gravitational collapse serve as the true description of astronomical black holes. For physical black holes, only their asymptotic structure before the horizon forms are…

The charge-singlet measurement toolbox
Abhijit Chakraborty, Randy Lewis, Christine A. Muschik
https://arxiv.org/abs/2510.08718 https://arxiv.org/pdf/2510.0…

The charge-singlet measurement toolbox
Symmetry is fundamental to physical laws across different scales$\unicode{x2014}$from spacetime structure in general relativity to particle interactions in quantum field theory. Local symmetries, described by gauge theories, are central to phenomena such as superconductivity, topological phases, and the Standard Model of particle physics. Emerging simulation techniques using tensor network states or quantum computers offer exciting new possibilities of exploring the physics of these gauge theor…

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs
Eva Stafne, Juliette Becker
https://arxiv.org/abs/2509.26421 https://

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs
Planets orbiting in the habitable zones of white dwarfs have recently been proposed as promising targets for biosignature searches. However, since the white dwarf habitable zone resides at 0.01 - 0.1 AU, planets residing there are subject to tidal heating if they have any orbital eccentricity. Previous work (Barnes & Heller 2013) identified nearby planetary companions as potential roadblocks to habitability of planets around white dwarfs, as such companions could induce secular oscillations in …

New pre-print out: "Types, equations, dimensions and the Pi theorem".
We formalized the covariance principle (physical laws must be independent of units) as a homomorphism between the algebra of physical quantities and real numbers.
While the Pi Theorem from Dimensional Analysis (DA) is non-constructive, we introduce a constructive method for applying it. This could enable DA-driven program derivation where the type checker helps identify valid physical laws.
📝 Bl…

A Parametrized Test of General Relativity for LISA Massive Black Hole Binary Inspirals
Manuel Piarulli, Sylvain Marsat, Elise M. S\"anger, Alessandra Buonanno, Jan Steinhoff, Nicola Tamanini
https://arxiv.org/abs/2510.06330

A Parametrized Test of General Relativity for LISA Massive Black Hole Binary Inspirals
Laser Interferometer Space Antenna (LISA) observations of massive black hole binaries (MBHBs) will provide long duration inspiral signals with high signal-to-noise ratio (SNR) data, ideal for testing general relativity (GR) in the strong-field and high-velocity regime. We present an extension of the Flexible Theory-Independent (FTI) framework, adapted to gravitational waves (GWs) from MBHBs observed with LISA, to perform parametrized inspiral tests of GR. This approach introduces generic deviat…

CPT breaking in noncommutative Magueijo-Smolin model
S. Mignemi
https://arxiv.org/abs/2510.08024 https://arxiv.org/pdf/2510.08024

CPT breaking in noncommutative Magueijo-Smolin model
We review an instance of noncommutative geometry based on a specific realization of the model of doubly special relativity proposed by Magueijo and Smolin (MS) on noncommutative spacetime. In particular, we discuss the Hopf algebra associated to it, which has not been considered in the literature till now. We show that the momentum sector of this model can be viewed as a particular basis of the \kp model. An interesting property is that the MS Hamiltonian is not invariant under the reversal of …

A physically interesting singularity in general relativity
Bob Holdom
https://arxiv.org/abs/2510.09506 https://arxiv.org/pdf/2510.09506

A physically interesting singularity in general relativity
We explore what appears to be a very benign timelike and naked singularity of the Weyl curvature scalar. This singularity arises in an inhomogeneous generalization of the Einstein static universe. The matter energy density is everywhere finite and it vanishes at the singularity. The spacetime still enjoys causal geodesic completeness and unambiguous wave dynamics. Each singularity contributes to the Komar mass of the spacetime, and this reduces the required size of the positive cosmological con…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Leading soft theorems on plane wave backgrounds
Sonja Klisch
https://

A Python Interface for Numerical Relativity Program AMSS-NCKU
Chen-Kai Qiao, Yi Zheng, Zhou-Jian Cao
https://arxiv.org/abs/2509.21652 https://arxiv.org/pdf…

A Python Interface for Numerical Relativity Program AMSS-NCKU
Numerical relativity has produced wide-ranging influences on modern astrophysics and gravitational-wave astronomy. In this work, we develop a Python interface for the numerical relativity program AMSS-NCKU, which enables the automation of initializing and starting the AMSS-NCKU simulations and the automatically generating visualizations of the output results. Numerical relativity simulations using this Python interface have been presented through two representative examples (binary back hole an…

Crosslisted article(s) found for physics.hist-ph. https://arxiv.org/list/physics.hist-ph/new
[1/1]:
- Comment on Marek Czachor article entitled "On Relativity of Quantumness as Implied by Relativity ...
Krzysztof Sienicki, Miko{\l}aj Sienicki

Limiting the Yukawa Gravity through the Black Hole Shadows of Sgr A* and M87*
Yuan Tan, Youjun Lu, Kunyu Song
https://arxiv.org/abs/2510.04210 https://arxi…

Limiting the Yukawa Gravity through the Black Hole Shadows of Sgr A* and M87*
Recently, the \textit{EHT} collaboration unveiled the shadow images of the supermassive black hole (SMBH) M87* and Sgr A*, with angular radii of $42\pm3$\,$μ$as and $48.7\pm7.0$\,$μ$as, respectively. These observations are consistent with the shadow of a Kerr black hole in general relativity (GR). Observations of the shadow of SMBHs can be used to test modified gravity theories, including Yukawa gravity, in extremely strong fields. In this paper, we illustrate the shadows of Yukawa black hole…

Neural Post-Einsteinian Test of General Relativity with the Third Gravitational-Wave Transient Catalog
Yiqi Xie, Gautham Narayan, Nicol\'as Yunes
https://arxiv.org/abs/2510.02515

Neural Post-Einsteinian Test of General Relativity with the Third Gravitational-Wave Transient Catalog
Gravitational waves (GWs) from compact binaries are excellent probes of gravity in the strong- and dynamical-field regime. We report a test of general relativity (GR) with the third GW Transient Catalog (GWTC-3) using the recently developed neural post-Einsteinian framework, both on individual events and at the population level through hierarchical modeling. We find no significant violation of GR and place a constraint that, for the first time, efficiently covers non-GR theories characterized b…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- The Low Energy Limit of BFSS Quantum Mechanics
Oscar J. C. Dias, Jorge E. Santos
ht…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Tetrads in SU(3) X SU(2) X U(1) Yang-Mills geometrodynamics
Alcides Garat
https://…

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Elusive Plunges and Heavy Intermediate-mass-ratio Inspirals from Single and Binary Supermassive B...
Lazaros Souvaitzis, Antti Rantala, Thorsten Naab

[2025-10-15 Wed (UTC), 18 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Black Hole Ringdown Amplitudescopy
Francesco Crescimbeni, Xisco Jimenez-Forteza, Paolo Pani
https://arxiv.org/abs/2510.11782 https://arxiv.org/pdf/2510.117…

Black Hole Ringdown Amplitudescopy
Black hole ringdowns in extensions of General Relativity (GR) generically exhibit two distinct signatures: (1) theory-dependent shifts in the standard black-hole quasinormal modes, and (2) additional modes arising from extra fundamental fields --such as scalar, vector, or tensor degrees of freedom-- that can also contribute to the gravitational-wave signal. As recently argued, in general both effects are present simultaneously, and accurately modeling them is essential for robust tests of GR in…

Consistency of spin effects between numerical relativity and perturbation theory for inspiraling comparable-mass black hole binaries
Tousif Islam, Gaurav Khanna, Scott E. Field
https://arxiv.org/abs/2510.00531

Consistency of spin effects between numerical relativity and perturbation theory for inspiraling comparable-mass black hole binaries
Numerical relativity (NR) provides the most accurate waveforms for comparable-mass binary black holes but becomes prohibitively expensive for increasingly asymmetric mass ratios. Point-particle black hole perturbation theory (ppBHPT), which expands the Einstein equations in the small-mass-ratio limit, offers a computationally efficient alternative but is expected to break down in the comparable-mass regime because it neglects nonlinear effects. Nonetheless, several recent studies have shown tha…

Lorentz Covariant Supertranslation Frames for the Angular Momentum Aspect
Reza Javadinezhad, Massimo Porrati
https://arxiv.org/abs/2510.11849 https://arxiv…

Lorentz Covariant Supertranslation Frames for the Angular Momentum Aspect
In this letter, we review the well known ambiguity in defining angular momentum (and mass dipole) fluxes in general relativity and we reinterpret recent works that resolve the ambiguity by defining invariant charges. We resolve the ambiguity by finding the conditions that fix a frame for supertranslation and for space-time translation. We also present an elementary method for measuring the angular momentum aspect and work out explicitly the supertranslation frame-fixing conditions for the metri…

Eccentric binary black holes: A new framework for numerical relativity waveform surrogates
Peter James Nee, Adhrit Ravichandran, Scott E. Field, Tousif Islam, Harald P. Pfeiffer, Vijay Varma, Michael Boyle, Andrea Ceja, Noora Ghadiri, Lawrence E. Kidder, Prayush Kumar, Akash Maurya, Marlo Morales, Antoni Ramos-Buades, Abhishek Ravishankar, Katie Rink, Hannes R. R\"uter, Mark A. Scheel, Md Arif Shaikh, Daniel Tellez

Eccentric binary black holes: A new framework for numerical relativity waveform surrogates
Mounting evidence indicates that some of the gravitational wave signals observed by the LIGO/Virgo/KAGRA observatories might arise from eccentric compact object binaries, increasing the urgency for accurate waveform models for such systems. While for non-eccentric binaries, surrogate models are efficient and accurate, the additional features due to eccentricity have posed a challenge. In this letter, we present a novel method for decomposing eccentric numerical relativity waveforms which makes …

False Alarm Rates in Detecting Gravitational Wave Lensing from Astrophysical Coincidences: Insights with Model-Independent Technique GLANCE
Aniruddha Chakraborty, Suvodip Mukherjee
https://arxiv.org/abs/2510.11790

False Alarm Rates in Detecting Gravitational Wave Lensing from Astrophysical Coincidences: Insights with Model-Independent Technique GLANCE
The strong lensing gravitational waves (GWs) due to intervening massive astrophysical systems between the source and an observer are an inevitable consequence of the general theory of relativity, which can produce multiple GW events in overlapping sky localization error. However, the confirmed detection of such a unique astrophysical phenomenon is challenging due to several sources of contamination, arising from detector noise to astrophysical uncertainties. Robust model-independent search tech…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- $\kappa$-General-Relativity I: a Non-Commutative GR Theory with the $\kappa$-Minkowski Spacetime ...
Daniel Rozental, Ofek Birnholtz

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Model-independent cosmological inference after the DESI DR2 data with improved inverse distance l...
Jia-Le Ling, Guo-Hong Du, Tian-Nuo Li, Jing-Fei Zhang, Shao-Jiang Wang, Xin Zhang

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Non-spherical effects on the mass function of Primordial Black Holes
Albert Escriv\`a, Chul-Moon Yoo

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Regular black holes in isothermal cavity
Athanasios G. Tzikas
https://

[2025-10-14 Tue (UTC), 29 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Universality of free fall in Planck-scale deformed Newtonian gravity
Giuseppe Fabiano, Domenico Frattulillo, Christian Pfeifer, Fabian Wagner
https://arxiv.org/abs/2510.02046 ht…

Universality of free fall in Planck-scale deformed Newtonian gravity
The universality of free fall is one of the most cherished principles in classical gravity. Its fate in the quantum world is one of the key questions in fundamental physics. We investigate the universality of free fall in the context of Planck scale modifications of Newtonian gravity. Starting from a doubly-special-relativity setting we take the Newtonian limit to obtain deformed Galilean relativity. We study the interaction between two test particles, subject to deformed Galilean relativity, a…

Analytic and accurate approximate metrics for black holes with arbitrary rotation in beyond-Einstein gravity using spectral methods
Kelvin Ka-Ho Lam, Adrian Ka-Wai Chung, Nicol\'as Yunes
https://arxiv.org/abs/2510.05208

Analytic and accurate approximate metrics for black holes with arbitrary rotation in beyond-Einstein gravity using spectral methods
A key obstacle for theory-specific tests of general relativity is the lack of accurate black-hole solutions in beyond-Einstein theories, especially for moderate to high spins. We address this by developing a general framework--based on spectral and pseudospectral methods--to obtain analytic, closed-form spacetimes representing stationary, axisymmetric black holes in effective-field-theory extensions of general relativity to leading order in the coupling constants. The approach models the spacet…

Fermionic Love number of Reissner-Nordstr\"om black holes
Xiankai Pang, Yu Tian, Hongbao Zhang, Qingquan Jiang
https://arxiv.org/abs/2510.10036 https://

Fermionic Love number of Reissner-Nordström black holes
The tidal deformation of compact objects, characterised by their Love numbers, provides insights into the internal structure of neutron stars and black holes. While bosonic tidal Love numbers vanish for black holes in general relativity, it has been recently revealed that fermionic tidal perturbations can induce non-zero Love numbers for Kerr black holes. In this paper, we investigate the response of the Reissner-Nordström black hole to the fermionic Weyl field. As a result, we find that the c…

Cyclic universe and uniform rate inflation in loop quantum cosmology
Bikash Chandra Paul, Sahil Saini
https://arxiv.org/abs/2510.11230 https://arxiv.org/pd…

Cyclic universe and uniform rate inflation in loop quantum cosmology
We investigate uniform rate inflationary universe in the framework of Loop quantum cosmology. The potential for uniform rate inflation in a loop quantized FRW spacetime turns out to be a polymerized version of the corresponding potential in general relativity, which mimics the potentials for a polymerized scalar field and that for hybrid natural inflation (HNI). The potential leads to a cyclic universe with identical epochs separated by quantum bounces which replace the classical singularity. T…

Weyl symmetry without the traceless condition
Israel Quiros
https://arxiv.org/abs/2510.09957 https://arxiv.org/pdf/2510.09957

Weyl symmetry without the traceless condition
We show that the requirement that the trace of the stress-energy tensor of matter must vanish if invariance under Weyl rescalings is a symmetry of a given gravitational theory, is not a general result but depends on the gravitational theory and on whether the matter action is form-invariant under Weyl rescalings or not. We focus on conformal general relativity with a Weyl form-invariant matter action. In this case, a linear dependence of the variations of the metric and of the Brans-Dicke scala…

Adiabatic Inspiral Transition and Induction to Plunge of a Compact Body in Equatorial Plane Around a Massive Kerr Black Hole
Boyan Wang
https://arxiv.org/abs/2510.10240 https://…

Adiabatic Inspiral Transition and Induction to Plunge of a Compact Body in Equatorial Plane Around a Massive Kerr Black Hole
This paper reconstructs the derivation process from the Kerr metric to the adiabatic inspiral, transition, and plunge regimes, aiming to highlight the details and logical connections often overlooked in previous derivations. The first half provides a comprehensive roadmap for readers familiar with advanced general relativity to follow the entire logic of the inspiral-transition-plunge regime from this paper alone. The second half addresses the discontinuity between the adiabatic inspiral and th…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Modeling Tidal Disruptions with Dynamical Tides
Zihan Zhou, Giovanni Maria Tomaselli, Irvin Mart\'inez-Rodr\'iguez, Jingping Li

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Gravitational Waves on Kerr Black Holes I: Reconstruction of Linearized Metric Perturbations
Roman Berens, Trevor Gravely, Alexandru Lupsasca

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Large-scale peculiar velocities in the universe
Christos G. Tsagas, Leandros Perivolaropoulos, Kerkyra Asvesta

Cosmological Perturbation in New General Relativity: Propagating mode from the violation of local Lorentz invariance
Kyosuke Tomonari, Taishi Katsuragawa, Shin'ichi Nojiri
https://arxiv.org/abs/2509.18772

[2025-10-13 Mon (UTC), 9 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Higher-form (Quasi)Hydrodynamics from Holography: Deformations and Dualities
Andr\'e Oliveira Pinheiro (Heriot-Watt University)

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- The emergence of Einstein gravity from topological supergravity in $3 1$D
Tianyao Fang, Zheng-Cheng Gu

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Rolling with modular symmetry: quintessence and de Sitter in heterotic orbifolds
Gordillo-Ruiz, Hernandez-Segura, Portillo-Castillo, Ramos-Sanchez, Zavala

Intrinsic Heisenberg-type lower bounds on spacelike hypersurfaces in general relativity
Thomas Sch\"urmann
https://arxiv.org/abs/2510.01628 https://ar…

Intrinsic Heisenberg-type lower bounds on spacelike hypersurfaces in general relativity
We prove a coordinate- and foliation-independent Heisenberg-type lower bound for quantum states strictly localized in geodesic balls of radius $r$ on spacelike hypersurfaces of arbitrary spacetimes (with matter and a cosmological constant). The estimate depends only on the induced Riemannian geometry of the slice; it is independent of the lapse, shift, and extrinsic curvature, and controls the canonical momentum variance/uncertainty $σ_p$ by the first Dirichlet eigenvalue of the Laplace-Beltra…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- A proof of Generalized Connected Wedge Theorem
Bowen Zhao
https://

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Thermodynamics, photon sphere and thermodynamic geometry of Ay\'{o}n-Beato-Garc\'{i}a Spacetime
Kartheek Hegde, A. Naveena Kumara, C. L. Ahmed Rizwan, Md Sabir Ali, Shreyas Punacha, K. M. Ajith

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Asymptotically Flat Rotating Topological Stars
Pierre Heidmann, Paolo Pani, Jorge E. Santos

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Beyond holography: the entropic quantum gravity foundations of image processing
Ginestra Bianconi

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Thermodynamics and the Joule-Thomson expansion of dilaton black holes in 2 1 dimensions
Leonardo Balart, Sharmanthie Fernando

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- A Holographic prescription for generalized Schwinger-Keldysh contours
Martin Ammon, Jette Germerodt, Christoph Sieling, Julio Virrueta

[2025-10-10 Fri (UTC), 18 new articles found for gr-qc General Relativity and Quantum Cosmology]
toXiv_bot_toot

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Scalar-induced gravitational waves including isocurvature perturbations with lattice simulations
Xiang-Xi Zeng

[2025-10-09 Thu (UTC), 19 new articles found for gr-qc General Relativity and Quantum Cosmology]
toXiv_bot_toot

A comprehensive look into the accuracy of SpEC binary black hole waveforms
Taylor Knapp, Katerina Chatziioannou, Keefe Mitman, Mark A. Scheel, Michael Boyle, Lawrence E. Kidder, Harald Pfeiffer
https://arxiv.org/abs/2510.06393

A comprehensive look into the accuracy of SpEC binary black hole waveforms
Numerical relativity simulations provide a full description of the dynamics of binary systems, including gravitational radiation. The waveforms produced by these simulations have a number of applications in gravitational-wave detection and inference. In this work, we revisit the accuracy of the waveforms produced by the Spectral Einstein Code. Motivated by the wide range of waveform applications, we propose and explore three accuracy metrics between simulation resolutions: (i) the generalized f…

[2025-10-08 Wed (UTC), 13 new articles found for gr-qc General Relativity and Quantum Cosmology]
toXiv_bot_toot

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Residual Symmetries and BRST Cohomology of Schwarzschild in the Kerr-Schild Double Copy
Brandon Holton

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Yukawa coupling, and inflationary correlation functions for a spectator scalar via stochastic spe...
Sourav Bhattacharya, Sudesh Kumar

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Expectations for the first supermassive black-hole binary resolved by PTAs II: Milestones for bin...
Polina Petrov, Levi Schult, Stephen R. Taylor, Nihan Pol, Nima Laal, Maria Charisi, Chung-Pei Ma

[2025-10-07 Tue (UTC), 23 new articles found for gr-qc General Relativity and Quantum Cosmology]
toXiv_bot_toot

Bayesian Calibration of Gravitational-Wave Detectors Using Null Streams Without Waveform Assumptions
Isaac C. F. Wong, Francesco Cireddu, Milan Wils, Tom Colemont, Harsh Narola, Chris Van Den Broeck, Tjonnie G. F. Li
https://arxiv.org/abs/2510.06327

Bayesian Calibration of Gravitational-Wave Detectors Using Null Streams Without Waveform Assumptions
We introduce a Bayesian null-stream method to constrain calibration errors in closed-geometry gravitational-wave (GW) detector networks. Unlike prior methods requiring electromagnetic counterparts or waveform models, this method uses sky-independent null streams to calibrate the detectors with any GW signals, independent of general relativity or waveform assumptions. We show a proof-of-concept study to demonstrate the feasibility of the method. We discuss prospects for next-generation detectors…

Toward a Theory of Gravitational Wave Turbulence
Holly Krynicki, Jiaxi Wu, Elias R. Most
https://arxiv.org/abs/2509.19769 https://arxiv.org/pdf/2509.19769

Toward a Theory of Gravitational Wave Turbulence
General relativity describes the dynamics of gravitational waves, which can feature nonlinear interactions, such as those underlying turbulent processes. Theoretical and numerical explorations have demonstrated the existence of gravitational wave turbulence, of which a full and general mathematical description is currently not known. Here, we take essential steps towards such a theory. Leveraging a formulation exactly recasting general relativity as a set of nonlinear electrodynamics equations,…

Wormholes in Einstein-Dirac-Maxwell theory with identical spacetime asymptotics
Vladimir Dzhunushaliev, Vladimir Folomeev, Nurzada Beissen, Adilet Nurmukhamedov
https://arxiv.org/abs/2510.03656

Wormholes in Einstein-Dirac-Maxwell theory with identical spacetime asymptotics
Within general relativity, we study spherically symmetric configurations with wormhole topology consisting of spinor fields and a Maxwell electric field. For such a system, we construct complete families of regular asymmetric solutions describing wormholes connecting two identical Minkowski spacetimes. The physical properties of such systems are completely determined by the values of three input quantities: the throat parameter, the spinor frequency, and the coupling constant. Depending on the …

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Testing the nature of GW200105 by probing the frequency evolution of eccentricity
Avinash Tiwari, Sajad A. Bhat, Md Arif Shaikh, Shasvath J. Kapadia

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Knot invariants and indefinite causal order
Samuel Fedida, Anne-Catherine de la Hamette, Viktoria Kabel, \v{C}aslav Brukner

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Spinning Boundary Correlators from (A)dS$_4$ Twistors
Mariana Carrillo Gonz\'alez, Th\'eo Keseman

[2025-10-06 Mon (UTC), 16 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Formation of quiescent big bang singularities
Hans Oude Groeniger, Oliver Petersen, Hans Ringstr\"om

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Particles before symmetry
Henrique Gomes
https://arxiv.org…

Gravitomagnetic-Hydrodynamics and Turbulence in Early Universe
Jiaxiang Liang, Peng Xu, Minghui Du, Yifu Cheng, Zhan Wang, Ziren Luo
https://arxiv.org/abs/2510.03711 https://

Gravitomagnetic-Hydrodynamics and Turbulence in Early Universe
This work tries to establish the theoretical framework for gravitomagnetic-hydrodynamics (GMHD), revealing a fundamental correspondence between geometrodynamics and magnetohydrodynamic phenomena in general relativity. By introducing the gravitoelectromagnetic formalism to relativistic fluids, a set of leading-order GMHD equations is derived that govern the co-evolution of spacetime geometry and matter dynamics in the early Universe. This analysis reveals that, under high-temperature and high-de…

Testing black hole metrics with binary black hole inspirals
Zhe Zhao, Swarnim Shashank, Debtroy Das, Cosimo Bambi
https://arxiv.org/abs/2510.04703 https://…

Testing black hole metrics with binary black hole inspirals
Gravitational wave astronomy has opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. In this study, we examine a series of well-motivated deviations from the classical Kerr solution of General Relativity and employ gravitational wave data to place constraints on possible deviations from the Kerr geometry. The method involves calculating the phase of gravitational waves using the effective one-body formalism and then applying the parameterized…

$I-$Love$-$Curvature: Exploring compact stars' quasi-universal relation with curvature scalars
M. D. Danarianto, A. Sulaksono
https://arxiv.org/abs/2510.04260 https://

$I-$Love$-$Curvature: Exploring compact stars' quasi-universal relation with curvature scalars
We investigate quasi-universal relations in neutron stars linking standard observables, such as tidal deformability ($Λ$) and normalized moment of inertia ($\bar{I}$), with normalized curvature scalars in general relativity. These curvature scalars include the Ricci scalar ($\mathcal{R}$), the Ricci tensor contraction ($\mathcal{J}$), the Weyl scalar ($\mathcal{W}$), and the Kretschmann scalar ($\mathcal{K}$). We systematically examine both piecewise polytropic and color-flavor-locked equation…

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Polarimetry imprints of exotic compact objects: relativistic fluid spheres and gravastars
Hanna Liis Tamm, Nicolas Aimar, Jo\~ao Lu\'is Rosa

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/2]:
- Status of Birkhoff's theorem in polymerized semiclassical regime of Loop Quantum Gravity
Luca Cafaro, Jerzy Lewandowski

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Entanglement and apparent thermality in simulated black holes
Iason A. Sofos, Andrew Hallam, Jiannis K. Pachos

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- On the Accelerated Expansion of the Universe
Naman Kumar
https://

Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Quantum Simulation of Fermions in $AdS_2$ Black Hole: Chirality, Entanglement, and Spectral Cross...
Kazuki Ikeda, Yaron Oz

The Anholonomic Frame and Connection Deformation Method for constructing off-diagonal solutions in (modified) Einstein gravity and nonassociative geometric flows and Finsler-Lagrange-Hamilton theories
Lauren\c{t}iu Bubuianu, Julia O. Seti, Douglas Singleton, Sergiu I. Vacaru, El\c{s}en Veli Veliev
https://arxiv.org/abs/2510.02321

The Anholonomic Frame and Connection Deformation Method for constructing off-diagonal solutions in (modified) Einstein gravity and nonassociative geometric flows and Finsler-Lagrange-Hamilton theories
This article is a status report on the Anholonomic Frame and Connection Deformation Method, AFCDM, for constructing generic off-diagonal exact and parametric solutions in general relativity, GR, relativistic geometric flows, and modified gravity theories, MGTs. Such models can be generalized to nonassociative and noncommutative star products on phase spaces and modelled equivalently as nonassociative Finsler-Lagrange-Hamilton geometries. Our approach involves a nonholonomic geometric reformulat…

Cosmological and Dynamical Aspects of Teleparallel Gravity and its Extension
L K Duchaniya
https://arxiv.org/abs/2510.02491 https://arxiv.org/pdf/2510.0249…

Cosmological and Dynamical Aspects of Teleparallel Gravity and its Extension
This thesis investigates the characteristics of modified teleparallel gravity models that incorporate a scalar field and a trace of the energy-momentum tensor, with particular attention to their cosmological effects, especially regarding late-time cosmic acceleration. Teleparallel gravity, as an alternative framework to General Relativity, defines gravity through torsion rather than curvature, and when combined with a scalar field, it allows exploration of a wider variety of cosmological scenar…

[2025-10-03 Fri (UTC), 16 new articles found for gr-qc General Relativity and Quantum Cosmology]
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QNM families: classification and competition
Zhen-Hao Yang, Liang-Bi Wu, Xiao-Mei Kuang, Wei-Liang Qian
https://arxiv.org/abs/2510.02033 https://arxiv.org/…

QNM families: classification and competition
The perturbation spectra of black hole (BH) beyond standard general relativity (GR) may exhibit complex structures with long-lived modes that generate echo-like modulations on the ringdown signal. However, a systematic framework for understanding the internal structure of such spectra, the physical nature of different mode families, and their dynamical excitation is still undeveloped. In this paper, we address this issue by proposing a potential methodology that combines frequency-domain classi…

[2025-10-02 Thu (UTC), 17 new articles found for gr-qc General Relativity and Quantum Cosmology]
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Crosslisted article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Charged Black-Hole Binary Evolution at Second Post-Newtonian Order
Andrea Placidi, Elisa Grilli, Marta Orselli, Matteo Pegorin, Nicola Bartolo, Pierpaolo Mastrolia

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[1/1]:
- Constraining matter-bounce scenario from scalar-induced vector perturbations
Mian Zhu, Chao Chen

Perturbations of Minkowski spacetime with regular conformal compactification
Andrea N\"utzi
https://arxiv.org/abs/2510.01964 https://arxiv.org/pdf/251…

Perturbations of Minkowski spacetime with regular conformal compactification
We construct perturbations of Minkowski spacetime in general relativity, when given initial data that decays inverse polynomially to initial data of a Kerr spacetime towards spacelike infinity. We show that the perturbations admit a regular conformal compactification at null and timelike infinity, where the degree of regularity increases linearly with the rate of decay of the initial data to Kerr initial data. In particular, the compactification is smooth if the initial data decays rapidly to K…