⚛️ Category

gr-qc

3826 papers

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.

⚛️ general relativity

Topological effects in the polarization of the Fulling-Rindler vacuum

This paper investigates how toral compactification and magnetic flux-induced quasi-periodicity affect the vacuum expectation values of the field squared and energy-momentum tensor for a charged scalar field in Fulling-Rindler spacetime, revealing topological contributions such as off-diagonal stress components and distinct asymptotic behaviors near the Rindler horizon that are applied to cylindrical and topological black holes.

A. A. Saharian, G. V. Mirzoyan, V. S. Torosyan2026-07-07
⚛️ general relativity

Neutron stars in f(Q)=Q+ξQ2f(Q) = Q +ξQ^2 gravity

This paper investigates the structure of neutron stars within the f(Q)=Q+ξQ2f(Q) = Q + \xi Q^2 gravity framework by deriving modified Tolman-Oppenheimer-Volkoff equations, numerically solving them with realistic equations of state to determine mass-radius relations and maximum masses, and analyzing the behavior of the nonmetricity scalar to compare results with observational constraints.

J. C. N. de Araujo, H. G. M. Fortes2026-07-07
⚛️ general relativity

A stepping stone toward detecting gravitational wave memory: a cumulative analysis with the full (ℓ=2,m=0)(\ell=2, m=0) spherical harmonic using events from GWTC-4.0 and GWTC-5.0

This paper presents a Bayesian cumulative analysis of GWTC-4.0 and GWTC-5.0 binary black hole events using the IMRPhenomTHM_20 waveform model to test for the (ℓ=2,m=0)(\ell=2, m=0) spherical harmonic mode, finding modest evidence for its presence and projecting that a significantly larger catalog of approximately 166 events will be required to achieve decisive statistical detection of gravitational wave memory.

Maria Rosselló-Sastre, Sascha Husa, Yumeng Xu, Jorge Valencia, Joan Llobera-Querol, Antoni Ramos-Buades2026-07-07
⚛️ general relativity

Leading weak-field magnetic corrections to charged scalar quasinormal modes of Kerr black holes in the Melvin--Kerr geometry

This paper computes the leading-order magnetic corrections to the charged-scalar quasinormal modes of a Kerr black hole in a weak external magnetic field (Melvin-Kerr geometry), demonstrating that these shifts are fully captured by an effective mass substitution in the radial equation and exhibit a sign-dependent linear behavior relative to the black hole's rotation and the mode's azimuthal number.

Haryanto M. Siahaan2026-07-07
⚛️ general relativity

Cosmological Correlators in KLF and the Double-Exchange

This paper introduces a Kontorovich-Lebedev-Fourier (KLF) space formalism that replaces nested time integrals with frequency integrals over rational propagators to compute tree-level cosmological correlators, demonstrating the method's efficacy through a complete analytical treatment of the double-exchange diagram expressed as a double series of hypergeometric functions.

Nathan Belrhali, Arthur Poisson, Sébastien Renaux-Petel2026-07-07
⚛️ general relativity

Modeling Uncertainties in Modified Gravity Predictions for the Stochastic Gravitational-Wave Background

This study demonstrates that future third-generation gravitational-wave detectors can effectively constrain frequency-dependent modified gravity effects in the stochastic background through distinct spectral distortions, whereas smooth amplitude changes from modified propagation remain more challenging to disentangle from astrophysical population uncertainties.

Rodrigo Fraga, Rafael C. Nunes2026-07-07
⚛️ general relativity

Bridging inflation and reheating: chiral gravitational waves from aHz to GHz

This paper investigates chiral gravitational waves generated by a parity-violating term in teleparallel gravity from inflation through reheating, demonstrating how these signals produce distinct CMB correlations detectable by LiteBIRD and enhanced high-frequency amplitudes accessible to future resonant cavity experiments, thereby offering a unique multi-frequency probe of early Universe parity violation.

Chengjie Fu, Chao Chen, Yi Wang2026-07-03