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.

Emergent Hawking Radiation and Quantum Sensing in a Quenched Chiral Spin Chain

This paper investigates the emergence and detection of Hawking radiation in a quenched 1D chiral spin chain by mapping its dynamics to a curved spacetime Dirac fermion, revealing that while the radiation spectrum exhibits greybody-like deviations, a weakly coupled qubit detector can faithfully measure the Hawking temperature, whereas strong coupling obscures the thermal signature by thermalizing with the global environment.

Nitesh Jaiswal, S. Shankaranarayanan2026-04-15⚛️ hep-th

Polytropic $f(Q)$ cosmology and its implications for the $H_0$ tension

This paper investigates the dark energy problem and the $H_0$ tension by deriving exact cosmological solutions for a polytropic equation of state within a power-law $f(Q)$ gravity framework, utilizing Bayesian statistical analysis to constrain model parameters and evaluate their physical implications.

Raja Solanki2026-04-15⚛️ gr-qc

Astrophysical Signatures of Einstein-Skyrme Anti-de Sitter Black Holes: Epicyclic Frequencies and QPO Constraints

This paper investigates the geodesic motion and epicyclic oscillations of particles around Einstein-Skyrme Anti-de Sitter black holes, revealing a unique signature where the radial frequency overtakes the orbital frequency at large distances, and demonstrates through MCMC analysis of X-ray binary and galactic center QPO data that this model consistently fits observations with a Skyrme charge parameter of approximately 0.6.

Faizuddin Ahmed, Ahmad Al-Badawi, İzzet Sakallı2026-04-15⚛️ gr-qc

Gravitational lensing around a Kerr-Sen black hole in plasma background

This paper investigates the gravitational lensing of massless particles around a rotating, charged Kerr-Sen black hole immersed in magnetized plasma, analyzing how both homogeneous and inhomogeneous plasma distributions, along with the black hole's rotation and charge, influence light deflection and circular photon orbits compared to the vacuum case.

Saswati Roy, Shubham Kala, Sayanika Modak, Hemwati Nandan, Amare Abebe2026-04-15⚛️ gr-qc

Beyond the Cosmological Constant: Breaking the Geometric Degeneracy of $f(Q)$ cosmology via Redshift-Space Distortions

This paper demonstrates that while Hybrid $f(Q)$ cosmology remains geometrically degenerate with $\Lambda$ CDM in the background expansion due to strict viability constraints, its unique perturbation sector—characterized by a suppressed effective gravitational constant and an amplitude compensation mechanism in $f\sigma_8$ —breaks this degeneracy and gains moderate statistical preference when constrained by redshift-space distortion data.

Ameya Kolhatkar, P. K. Sahoo2026-04-15⚛️ gr-qc

Equatorial periodic orbits and gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matter

This paper investigates equatorial periodic orbits and their gravitational wave signatures in Euler-Heisenberg black holes surrounded by perfect fluid dark matter, revealing how quantum electrodynamic corrections and dark matter jointly modify orbital stability and produce distinct burst-like waveform features that serve as sensitive probes for strong-field gravity.

Dhruba Jyoti Gogoi, Jyatsnasree Bora, Ali Övgün2026-04-15⚛️ gr-qc

Rotating Thin Shells in Einstein-Gauss-Bonnet Gravity

This paper constructs rotating thin shell solutions in Einstein-Gauss-Bonnet gravity by gluing two spacetimes with different mass and angular momentum parameters, deriving their equations of motion and analyzing the stability and collapse dynamics of both general and vacuum shells, including cases that lead to naked singularities.

João D. Álvares, Tiago V. Fernandes2026-04-15⚛️ gr-qc

Particle detector in a position-superposed black hole spacetime

This paper calculates the response of an Unruh--DeWitt detector in a superposition of BTZ black hole locations, demonstrating how Quantum Reference Frame transformations reveal nonclassical measurement contributions and distinguishing this scenario from mass-superposed black holes through spectral singularities.

Laurens Walleghem, Carlo Cepollaro2026-04-15⚛️ quant-ph

Post-Newtonian inspiral waveform model for eccentric precessing binaries with higher-order modes and matter effects

This paper introduces pyEFPEHM, an improved post-Newtonian inspiral waveform model for eccentric, spin-precessing compact binaries that incorporates higher-order modes, matter effects, and enhanced quasi-circular corrections, offering a robust and efficient tool for gravitational-wave analysis across a broad parameter space while acknowledging limitations in extreme regimes.

Gonzalo Morras, Geraint Pratten, Patricia Schmidt, Alessandra Buonanno2026-04-15⚛️ gr-qc

Distinguish Bardeen-like black holes by Gravitational lensing

This paper investigates gravitational lensing by Bardeen-like regular black holes without Cauchy horizons, demonstrating that while weak-field predictions align with current observations of ESO 325-G004, strong-field measurements of relativistic images around Sgr A* and M87*—specifically the angular separation, flux ratio, and time delays—could distinguish these models from Schwarzschild black holes through future observations.

Limei Yuan, Chen-Hung Hsiao, Yidun Wan2026-04-15⚛️ gr-qc

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