Tootfinder

Gravitationswellen: Massereichste Kollision zweier Schwarze Löcher lässt rätseln
Erneut wurden Gravitationswellen beobachtet, deren Ursprung es eigentlich gar nicht geben dürfte: eine Kollision von Schwarzen Löchern mit "verbotener" Masse.

Progress in Einstein-Cartan gravity
Mikhail Shaposhnikov
https://arxiv.org/abs/2506.11847 https://arxiv.org/pdf/2506.11847

Progress in Einstein-Cartan gravity
It is well-known that the gravitational force can be obtained by gauging the Lorentz group, which puts gravity on the same footing as the Standard Model fields. The resulting theory - Einstein-Cartan gravity - has several crucial advantages. I will overview the construction of the Weyl-invariant version of this theory and discuss its applications in particle physics and cosmology, in particular for inflation and the strong CP problem.

#Graphiti #MCP is cool, they said 🙄
Graphiti MCP is brilliant, you absolutely have to try it, they said 🙄
#RAG is cool. Yeah, except it’s useless if absolutely nothing works out of the bo…

Simulating Mass-Dependent Decoherence in Quantum Computers: Baseline Signatures for Testing Gravity-Induced Collapse
Viswak R Balaji, Samuel Punch
https://arxiv.org/abs/2508.10590

Simulating Mass-Dependent Decoherence in Quantum Computers: Baseline Signatures for Testing Gravity-Induced Collapse
We present a quantum computing simulation study of mass-dependent decoherence models inspired by Penrose's gravity-induced collapse hypothesis. According to objective reduction (OR) theory, quantum superpositions become unstable when the gravitational self-energy difference between branches exceeds a certain threshold, leading to a collapse time $τ\approx \hbar / E_G$. In this work, we implement a mass-dependent dephasing noise channel, $p(m) = 1 - e^{-k m^α}$, within the Qiskit AerSimulator,…

Gravitational wave propagation in bigravity in the late universe
David Brizuela, Marco de Cesare, Araceli Soler Oficial
https://arxiv.org/abs/2507.11526 ht…

Gravitational wave propagation in bigravity in the late universe
We carry out a detailed analytical investigation of the propagation of gravitational waves in bimetric gravity in a late-time de Sitter epoch. In this regime, the dynamical equations for the massless and massive graviton modes can be decoupled and solved exactly. We provide uniform approximations for the modes in terms of elementary functions, which are valid on all scales and for all viable mass windows. We identify different dynamical regimes for the system, depending on the propagation prope…

Importance of gravitational effects on the performances of a fully passive oscillating-foil turbine deployed horizontally
Alexina Roy-Saillant, Guy Dumas, Leandro Duarte, Guilhem Dellinger, Mathieu Olivier
https://arxiv.org/abs/2507.10711

Importance of gravitational effects on the performances of a fully passive oscillating-foil turbine deployed horizontally
This article presents a numerical study evaluating the impact of gravity on the performance of a fully passive oscillating-foil turbine operating in a horizontal configuration, that is, where the gravity acts along the heave direction. The study examines two sets of parameters corresponding to turbines driven by different aeroelastic instabilities. For turbines experiencing stall-flutter instability, the influence of gravity on performance metrics is minimal when inertial forces dominate or are…

On the Gravitational Origin of the QCD Axion
Georgios K. Karananas, Mikhail Shaposhnikov, Sebastian Zell
https://arxiv.org/abs/2506.11836 https://

On the Gravitational Origin of the QCD Axion
Gravity can give rise to (pseudo)scalar fields, for instance due to torsion. In particular, axions of gravitational origin have been proposed as a minimal and compelling solution to the strong CP problem. In this work, we critically examine the feasibility of this approach. We demonstrate that models in which the scalar field couples to fermionic currents only through derivatives do not yield a satisfactory axion. Moreover, we identify the necessary conditions for generating a gravitational axi…

Gravitational wave cosmology : an introduction
Gr\'egoire Pierra, Simone Mastrogiovanni
https://arxiv.org/abs/2507.10597 https://…

Gravitational wave cosmology : an introduction
This chapter introduces gravitational wave cosmology, focusing on the use of gravitational waves as standard sirens to probe the expansion history of the Universe. It presents and explains the methodologies behind bright and dark siren analyses, including their respective data requirements and underlying assumptions. Particular attention is given to the theoretical foundations of these approaches, the statistical frameworks used to interpret gravitational-wave events, and the treatment of selec…

Impact of Buchdahl metric potential on thin-shell gravastar framework in de Rham-Gabadadze-Tolley like massive gravity
Meghanil Sinha, S. Surendra Singh
https://arxiv.org/abs/2506.11171

Impact of Buchdahl metric potential on thin-shell gravastar framework in de Rham-Gabadadze-Tolley like massive gravity
This paper presents a study on gravitational vacuum stars (gravastars) with an isotropic matter distribution in de Rham-Gabadadze-Tolley (dRGT) massive gravity incorporating Buchdahl metric function. Here we have conducted an analysis on thin-shell singularity-free gravastar configuration. The study demonstrates the viability of gravastars as alternatives to black holes (BHs) in this massive gravity. Our research yields singularity free analytical solutions for gravastar interior and without ev…

Statistics in 3d gravity from knots and links
Jeevan Chandra
https://arxiv.org/abs/2508.10864 https://arxiv.org/pdf/2508.10864

Statistics in 3d gravity from knots and links
In recent years, there has been remarkable progress in evaluating wormhole amplitudes in 3d Einstein gravity with negative cosmological constant and matching them to statistics of 2d CFT data. In this work, we compute non-perturbative Gaussian and non-Gaussian gravitational contributions to the OPE statistics using a framework that can systematically generate a class of such non-perturbative effects - \textit{Fragmentation of knots and links by Wilson lines}. We illustrate this idea by construc…