Theoretical Basis for a Solution to the Cosmological Constant ProblemFollowing a short discussion of some unresolved issues in the standard model of cosmology (considered to be a generic LCDM model with flat geometry and an early period of inflation), an update on the…J. C. Lindner·Jun 3, 2026SaveLearn
Black Bounce Solutions from a Self-Interacting 3-Form Field in General RelativityWe construct a new class of black-bounce solutions sourced by a self-interacting 3-form field minimally coupled to general relativity and a scalar field. The 3-form field, which naturally arises in…Francisco S. N. Lobo, Manuel E. Rodrigues·Jun 3, 2026SaveLearn
Improved unimodular black holes with self-consistent renormalization scale identificationWe consider the renormalization group improvement of unimodular black hole metrics with an identification of the renormalization scale as a function of the radial coordinate that is self-consistent…Christopher D. Carone·Jun 3, 2026SaveLearn
Curvature conditions for generalized singularity theoremsWe study the curvature conditions introduced in [Class. Quant. Grav. 27, 152002] to predict focal points for trapped spacelike submanifolds in spacetimes of arbitrary dimensions, with the purpose of…Jeremías Daín, Gustavo Dotti·Jun 3, 2026SaveLearn
On spherically symmetric Berwald vacuum solutions in Finsler gravityBerwald-Finsler spacetimes are Finsler spacetimes that are closest to pseudo-Riemannian geometry, as their canonical nonlinear connection defines an affine connection on spacetime. In this paper, we…Nicoleta Voicu, Diana - Maria Birla, Christian Pfeifer·Jun 3, 2026SaveLearn
Equation of State Parameters for Fluid of Stringy Extended Objects in Cosmology with Cosmological ConstantWe construct the strong energy conditions (SECs) for both massive and massless stringy extended objects in the higher dimensional cosmology (HDC) with cosmological constant Λ. Exploiting these…Soon-Tae Hong, Bum-Hoon Lee·Jun 3, 2026SaveLearn
Quantum Circuit Complexity as a Measure of Particle Creation in Bouncing CosmologiesWe investigate the evolution of circuit complexity for a quantum scalar field in a non-singular bouncing cosmological background. Unlike previous perturbative approaches, we utilize the…Samak Boonpan·Jun 3, 2026SaveLearn
High-Order Summation-By-Parts Schemes for First-Order Hyperbolic Systems in Curvilinear Coordinates with SingularitiesFormulating stable numerical methods for hyperbolic systems in curvilinear coordinate with singularities, e.g. spherical coordinates, is complicated by the presence of these singularities. We present…Stamatis Vretinaris, Erik Schnetter·Jun 3, 2026SaveLearn
Mapping the star formation peak with LIGO A# and Next-Generation detectorsMeasuring the redshift evolution of star formation rate density is crucial in understanding the origin and evolution of galaxies and large scale structure in the universe. It is currently measured…Divyajyoti, Stephen Fairhurst, Mark Hannam et al.·Jun 3, 2026SaveLearn
Self-force calculations with numerical relativity methodsTo model gravitational waveforms from extreme mass-ratio inspirals (EMRIs) for the upcoming LISA space mission, gravitational self-force calculations are needed to second order in perturbation…Nils L. Vu, Nami Nishimura, Thomas Osburn et al.·Jun 3, 2026SaveLearn
Interior marginally outer trapped surfaces in Hayward black holesWe locate interior marginally outer trapped and marginally outer trapped open surfaces (MOTS/MOTOS) in the regular Haward metric with parameter b for which a critical (extremal) value b=bc…Abbas M. Sherif, Yen-Kheng Lim·Jun 3, 2026SaveLearn
The geometry of lunar gravitational wave detectionThe Lunar Gravitational Wave Antenna (LGWA) is a planned gravitational wave detector on the Moon, targeting the deci-Hertz band and expected to deliver breakthrough discoveries across several science…Jacopo Tissino, Filippo Santoliquido, Francesco Iacovelli et al.·Jun 3, 2026SaveLearn
Constraining Cosmological Parameters From Statistical Superluminal Effects Without a Distance LadderWe employ a statistical approach to study apparent superluminal motion of luminous sources in an expanding flat Friedmann--Lemaître--Robertson--Walker universe, explicitly incorporating cosmological…Hichem Guergouri, Omar Nemoul, Jamal Mimouni·Jun 3, 2026SaveLearn
Real Part Emergence in Purely Imaginary Quasinormal Modes in Perturbed de Sitter BraneworldsFor braneworlds with infinite extra dimensions, an analysis of the stability of the characteristic spectrum is essential for understanding their dynamical properties. In this study, we investigate…Hai-Long Jia, Wen-Di Guo, Yun-Tao Gu et al.·Jun 3, 2026SaveLearn
Spectral Density of the Causal PropagatorThe causal propagator (or Pauli-Jordan function), which multiplied by i is the spacetime commutator of the field [ϕ(x),ϕ(x')], plays an essential role in scalar quantum field theory. We…Joshua Y. L. Jones, Yasaman K. Yazdi·Jun 3, 2026SaveLearn
A New Self-Dual Gravitational Instanton Solution on a Local Conformal Kählerian Manifold in a Brane World ModelAn exact gravitational instanton solution on a vacuum Kerr-like warped spacetime in conformal dilaton gravity is found. Remarkably, the metric solution results from a first-order PDE, allowing the…Reinoud Jan Slagter·Jun 3, 2026SaveLearn
Topological Thermodynamics of Generalized Bardeen Black HoleNeves and Saa introduced a two parameter spacetime that includes the Hayward, Bardeen, and Simpson-Visser geometries as particular cases. In this work, we employ the generalized off-shell Helmholtz…A. A. M. Silva, M. H. Macedo, R. R. Landim·Jun 3, 2026SaveLearn
Fifth-Force Constraints from UV-Complete Scalar-Tensor GravityWe study an O(N) scalar multiplet nonminimally coupled to gravity and follow its renormalization-group (RG) flow in the vicinity of an interacting, nonperturbatively UV-complete scaling regime of…Alfio M. Bonanno, Emiliano M. Glaviano·Jun 3, 2026SaveLearn
New bounds for the area of MOTS and generalized ultra-massive spacetimesBounds for the area of general closed marginally trapped surfaces (MTSs) are presented. They do not require any stability condition, and are determined by a constant that depends on a particular…José M. M. Senovilla·Jun 3, 2026SaveLearn
Non-Minimally Coupled Scalar Field, Area Quantization and Black Hole EntropyThe enumeration of black hole entropy in candidate theories of quantum gravity utilises the quantum properties of microstates residing on the black hole horizon. For example, in Loop Quantum Gravity,…Sahil Devdutt, Akriti Garg, Ayan Chatterjee·Jun 3, 2026SaveLearn
Regular black holes from pure gravity in four dimensionsWe derive static spherically symmetric regular black holes as vacuum solutions to purely gravitational theories in four dimensions. To that end, we construct four-dimensional non-polynomial gravities…Johanna Borissova, Raúl Carballo-Rubio·Jun 3, 2026SaveLearn
Testing non-circular black hole spacetime with X-ray reflectionX-ray reflection spectroscopy is a powerful tool for testing the Kerr hypothesis and probing the strong gravity regime around accreting black holes. Most tests of General Relativity (GR) assume that…Leda Gao, Swarnim Shashank, Cosimo Bambi·Jun 3, 2026SaveLearn
Cosmological perturbations and gravitational waves in the general Einstein-vector theoryWe investigate the stability and gravitational waves (GWs) in the four-dimensional general Einstein-vector theory on a cosmological background. To study the stability, we systematically perform a…Xiao-Bin Lai, Yu-Zhi Fan, Yu-Qi Dong et al.·Jun 3, 2026SaveLearn
From the confluent Heun equation to a new factorized and resummed gravitational waveform for circularized, nonspinning, compact binariesWe introduce a new factorized and resummed waveform for circularized, nonspinning, compact binaries that leverages on the solution of the Teukolsky equation once mapped into a confluent Heun…Andrea Cipriani, Alessandro Nagar, Francesco Fucito et al.·Jun 3, 2026SaveLearn
Black hole images as probes of thermodynamic evolutionObservable signatures of black hole thermodynamics remain far from fully explored. Previous works have suggested that thermodynamic phase transitions of black holes could leave imprints on their…Lei You, Jinsong Yang·Jun 3, 2026SaveLearn