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General Relativity and Quantum Cosmology papers — page 118

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Yvonne Choquet-Bruhat 1923-2025
This is a memorial article for Yvonne Choquet-Bruhat, who was one of the great pioneers of mathematical general relativity and of partial differential equations. Starting with her 1952 result on…
Lydia Bieri, Jean-Pierre Bourguignon, David Garfinkle et al.May 3, 2026
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The radiation zone in general relativity
The radiation zone in electrodynamics is the region far enough away from the charges that the 1/r part of the field dominates over the 1/r2 piece. This concept is key in explaining two…
David GarfinkleMay 3, 2026
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Scalar-Electromagnetic Couplings as Source of Deformed Black Hole: From Shadows to Thermodynamic Topology
We reconstruct a static and spherically symmetric black hole geometry originally proposed as an effective metric by identifying a consistent matter source derived from a fundamental action. The…
Ednaldo L. B. Junior, José Tarciso S. S. Junior, Francisco S. N. Lobo et al.May 3, 2026
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Bertotti-Robinson and Bonnor-Melvin universes in nonlinear electrodynamics
We review the status of Birkhoff's theorem in the presence of nonlinear electrodynamics (NLE) - extending the analysis to the case without asymptotic flatness. This leads to the…
David Kubiznak, Otakar Svitek, Tayebeh TahamtanMay 3, 2026
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Polarization structure of gravitational waves in extended relativity
We analyze the polarization structure of gravitational waves in the framework of Extended Relativity (ER), using the deviation tensor as the fundamental observable quantity. Starting from the…
Yaakov FriedmanMay 3, 2026
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Reevaluation of Inflationary Dynamics in Extended General Relativity with Perturbatively and Tensorially Structured Conformal Metric
Based on the conventional metric tensor and driven by a nearly constant energy density, cosmic inflation, characterized by a remarkably accelerated expansion, was proposed as an early epoch in the…
Swapnil K. Singh, Saleh O. Allehabi, Azzah A. Alshehri et al.May 2, 2026
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Dyonic Ellis-Bronnikov wormholes from warped extra dimensions
We investigate traversable wormhole solutions within a four-dimensional effective theory derived from a five-dimensional Einstein-Maxwell-Chern-Simons action with a non-minimally coupled scalar…
Francisco S. N. Lobo, Miguel A. S. Pinto, Manuel E. RodriguesMay 2, 2026
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Relational quantum dynamics of the black hole interior: singularity resolution and quantum bounce
We study the interior of the Schwarzschild black hole which is isometric to the Kantowski-Sachs cosmological model, using a fully relational and gauge-invariant quantization framework. The physical…
Paolo Fragolino, Saeed RastgooMay 2, 2026
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On the formulations of the Fermat principle in general relativity and beyond
This paper presents a survey of the Fermat principle within the framework of general relativity, tracing its evolution from classical optics to its modern variational formulation in Lorentzian…
Erasmo Caponio, Miguel Angel JavaloyesMay 2, 2026
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Constraints on Einstein-aether gravity from the precision timing of PSR J1738+0333
We constrain Einstein-aether gravity -- a Lorentz-violating extension of General Relativity in which a dynamical, unit timelike vector field selects a preferred frame -- using updated high-precision…
Massimo Vaglio, Amodio Carleo, Abhimanyu Susobhanan et al.May 2, 2026
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A note on methods for computing the critical curve of Kerr-like black holes
This study systematically compares Bardeen's, de Vries's, and Grenzebach et al.'s celestial coordinate definitions of the critical curve ("shadow") of Kerr-like black holes. We…
Siddharth Kumar Sahoo, Indrani BanerjeeMay 2, 2026
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Feasible Stellar Interiors Beyond Einstein Gravity: Insights from Non-Metricity-Matter Coupled Gravitational Theory
This manuscript examines viability and stability of anisotropic compact objects in the framework of f(Q,Lm) gravity (Q is the non-metricity and Lm is the matter Lagrangian). We assume a…
M. Sharif, M. Zeeshan Gul, Adeeba AroojMay 2, 2026
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Gravitational Waves from a Black Hole Falling Radially into a Thin-Shell Traversable Wormhole
We compute the gravitational-wave signal generated by the radial infall of a stellar-mass black hole into a thin-shell Schwarzschild traversable wormhole. Modeling the black hole as a test particle,…
Mohammad Nosherwan Malik, James B. Dent, William E. Gabella et al.May 2, 2026
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Thermodynamics and information recovery of Schwarzschild AdS black holes in conformal Killing gravity
We study Schwarzschild AdS black holes in conformal Killing gravity, focusing on their thermodynamics and information recovery via the island formula. Treating the cosmological constant as pressure…
Yahya Ladghami, Brahim Asfour, Francisco S. N. Lobo et al.May 2, 2026
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Scalar emission from binary neutron stars in scalar-tensor theories with kinetic screening
We investigate the scalar emission from binary neutron stars in shift-symmetric scalar-tensor theories with kinetic screening (K-essence), using 3+1 numerical simulations in the decoupling limit.…
Ramiro Cayuso, Adrien Kuntz, Thiago Assumpcao et al.May 1, 2026
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Series solutions to the TOV equations
We present general series solutions to the Tolman-Oppenheimer-Volkoff equations for compact stellar objects. We develop an algorithm to compute the coefficients of the power series in terms of the…
Paulo LuzMay 1, 2026
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Nonperturbative Danielson-Satishchandran-Wald Decoherence with Unruh-DeWitt detectors
Recently, Danielson, Satishchandran, and Wald (DSW) have proposed a novel source of decoherence for uniformly accelerated charges and masses in spatial superposition in spacetimes containing a…
Levy B. N. Batista, André G. S. Landulfo, Robert B. Mann et al.May 1, 2026
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Entanglement probes of gravitational Kaluza-Klein spectra: signal hierarchy and model discrimination
Quantum-gravity-induced entanglement of masses (QGEM) provides a phase-sensitive probe of extra-dimensional corrections to the Newtonian potential at submillimeter separations. We compare three…
Yi Zhong, Tao-Tao Sui, Ke YangMay 1, 2026
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Dynamical tidal Love numbers of black holes under generic perturbations: Connecting black hole perturbation theory with effective field theory
The foundation for modeling the coupling of the internal structure of compact objects in binary systems to their dynamics and emitted gravitational waves is a systematic effective field theory (EFT)…
Sumanta Chakraborty, M. V. S Saketh, Tanja Hinderer et al.May 1, 2026
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Non-Supersymmetric Baryogenesis from U(1)-Breaking Scalar Dynamics
We present a non-supersymmetric mechanism for baryogenesis driven by the nonlinear dynamics of a complex scalar field with generalized self-interaction potentials that explicitly break the global…
Surendra Kumar Gour, Malay K. NandyMay 1, 2026
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Causality and its violation in f(R,Lm,ϕ,gμν∇μϕ∇νϕ) gravity
A modified gravitational model whose action is given by an arbitrary function of the Ricci scalar, the matter Lagrangian density, a scalar field, and its kinetic term is investigated as an extension…
L. A. S. Evangelista, M. L. R. Silva, J. V. Moretti et al.May 1, 2026
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Time-slicing quantum spacetimes
For quantum field theory on curved spacetimes, a critical role is played by their foliation into spacelike time-slices at each value t of a coordinate time, with corresponding metric in ADM form.…
Shahn MajidMay 1, 2026
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Generalized First Law and Smarr Formula: Beyond Additivity and Extensivity
The study of black hole thermodynamics becomes a central topic in gravitational physics, where the first law and the Smarr relation establish a deep connection between spacetime geometry and…
Usman Zafar, Krishnakanta Bhattacharya, Kazuharu BambaMay 1, 2026
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Stochastic Inflation in Numerical Relativity
A set of 3+1 equations for stochastic inflation incorporating all metric and scalar matter degrees of freedom, first presented in previous work, are re-derived in a gauge invariant manner. We then…
Yoann L. Launay, Gerasimos I. Rigopoulos, E. Paul S. ShellardMay 1, 2026
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Cosmology of fractional gravity
This is a first study of the cosmology of classical fractional gravity, a nonlocal proposal endowed with self-adjoint fractional d'Alembertian operators which serves as the basis for an…
Iván Salvador-García, Gianluca CalcagniApr 30, 2026
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