gr-qc papers | Gist.Science

Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.

At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.

Gravitational-wave imprints of Kerr--Bertotti--Robinson black holes: frequency blue-shift and waveform dephasing

This paper investigates gravitational wave signatures from Extreme Mass Ratio Inspirals in Kerr-Bertotti-Robinson spacetimes, revealing that external magnetic fields systematically blue-shift orbital frequencies, induce non-monotonic chirp evolution, and cause significant waveform dephasing detectable by LISA, thereby highlighting the potential for magnetic environments to bias parameter estimation if unmodeled.

Xiang-Qian Li, Hao-Peng Yan, Xiao-Jun Yue2026-04-01⚛️ gr-qc

Gravitational-wave Observations Suggest Most Black Hole Mergers Form in Triples

Hierarchical Bayesian analysis of gravitational-wave data reveals that the spin-orbit tilt angles of merging stellar-mass black holes predominantly peak at near-perpendicular orientations, a finding that challenges the traditional isolated-binary formation scenario and strongly supports the evolution of isolated massive stellar triples via the Lidov-Kozai effect as the dominant formation channel.

Jakob Stegmann, Fabio Antonini, Aleksandra Olejak, Sylvia Biscoveanu, Vivien Raymond, Stefano Rinaldi, Elizabeth Flanagan2026-04-01⚛️ gr-qc

Interior structure of black holes with nonlinear terms

This paper investigates the oscillatory behavior of the Kasner exponent near the critical point of hairy black holes dual to holographic superfluids, demonstrating that a fourth-power nonlinear term with coefficient $\lambda$ provides precise control over the inverse periodicity of these oscillations, thereby offering new insights into the dynamical structure of black hole interiors.

Zi-Qiang Zhao, Zhang-Yu Nie, Xing-Kun Zhang, Yu-Sen An, Jing-Fei Zhang, Xin Zhang2026-04-01⚛️ gr-qc

Simultaneous determination of Hubble constant and cosmic baryon density: Forecasts for the synergy between FRBs and emerging probes

This paper forecasts that combining Fast Radio Bursts (FRBs) with emerging probes like gravitational waves, strong gravitational lensing, and 21 cm intensity mapping can simultaneously resolve the Hubble tension and the missing baryon problem by breaking the severe $H_0$ - $\Omega_{\rm b}$ degeneracy, achieving sub-1.5% precision on both parameters in the $\Lambda$ CDM model.

Peng-Ju Wu, Bo-Yang Zhang, Ji-Guo Zhang, Guo-Hong Du, Shang-Jie Jin, Xin Zhang2026-04-01⚛️ gr-qc

Numerical simulations of oscillating and differentially rotating neutron stars

This paper extends the ROXAS pseudospectral code to simulate oscillating, differentially rotating neutron stars in the conformal flatness approximation, successfully validating axisymmetric results against existing literature while providing the first frequency values for non-axisymmetric modes in such configurations to improve post-merger gravitational wave modeling.

Santiago Jaraba, Jérôme Novak, Micaela Oertel2026-04-01⚛️ gr-qc

Gravitational-Wave Signals for Supernova Explosions of Three-Dimensional Progenitors

This study analyzes gravitational-wave signals from two 3D core-collapse supernova simulations of massive progenitors with vigorous pre-collapse shell activity, finding that while the resulting signals are detectable by current and future interferometers, they lack unique features directly attributable to the pre-collapse dynamics despite exhibiting distinct characteristics compared to previous models.

Alessandro Lella (Dipartimento Interateneo di Fisica "Michelangelo Merlin", Bari, INFN, Bari, Universita degli Studi di Padova, INFN, Padova), Giuseppe Lucente (SLAC Nat. Acc. Lab., CA), Daniel Kresse (…)2026-04-01⚛️ gr-qc

An updated constraint for the Gravitational Wave Background from the Gamma-ray Pulsar Timing Array

This paper presents an updated analysis of Fermi LAT gamma-ray pulsar data using a regularized likelihood method that correctly models cross-pulsar correlations, yielding a consistent gravitational wave background strain amplitude upper limit of $1.2\times10^{-14}$ while demonstrating the statistical robustness of the photon-by-photon approach.

Serena Valtolina, Colin J. Clark, Rutger van Haasteren, Aurélien Chalumeau, H. Thankful Cromartie, Matthew Kerr, Lars Nieder, Aditya Parthasarathy2026-04-01⚛️ gr-qc

A Covariant Phase Space Approach to Einstein-AEther Gravity

This paper employs the covariant phase space formalism to derive a consistent first law and generalized Smarr relations for stationary black holes in Einstein-Aether gravity, revealing that the total entropy comprises both gravitational and Aether contributions, which resolves apparent tensions between different thermodynamic prescriptions in the probe-mode limit.

Walter Arata, Stefano Liberati, Giulio Neri2026-04-01⚛️ gr-qc

Numerical calculations of neutron star mountains supported by crustal lattice pressure

This paper presents the first self-consistent numerical calculation of neutron star "mountains" driven by thermal gradients and crustal lattice pressure using realistic Brussels-Montreal equations of state, finding that such mountains are too small to dictate the spin equilibrium of low-mass X-ray binaries.

T. J. Hutchins, D. I. Jones2026-04-01🔭 astro-ph

Charged scalar fields on Reissner--Nordström spacetimes II: late-time tails and instabilities

This paper establishes the precise late-time oscillating and decaying tails of charged scalar fields on near-extremal Reissner--Nordström spacetimes and proves the existence of asymptotic instabilities along future null infinity and the event horizon using purely physical-space methods without assuming smallness of the scalar field charge.

Dejan Gajic2026-04-01⚛️ gr-qc

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