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.

Boundary conditions and Hilbert spaces in no-roll quantum cosmology

This paper constructs Hilbert spaces for minisuperspace quantum cosmology in the extreme slow-roll limit, demonstrating that fixing the potential energy yields a one-dimensional physical space favoring Vilenkin's tunnelling wavefunction, while allowing it to vary leads to an infinite-dimensional space where self-adjointness imposes boundary conditions that generally mix Hartle-Hawking and tunnelling wavefunctions, with a specific choice nearly recovering the Hartle-Hawking state.

Steffen Gielen2026-06-17⚛️ gr-qc

Black hole equations of state and response functions

This paper establishes a systematic thermodynamic framework based on potential representations to derive equations of state and response functions for ideal gases and Schwarzschild black holes in a spherical cavity, revealing that the quasi-local black hole's stability and thermodynamic behavior critically depend on the specific representation and fixed variables chosen.

Silvester G. A. Borsboom, Manus R. Visser2026-06-17⚛️ hep-th

Exciting the Vacuum: Non-Thermal Particle Bursts and Multi-Messenger Signals from Binary Black Holes

This paper investigates particle production in the dynamical curved spacetime of a binary black hole system during the weak-field inspiral phase, finding that the resulting non-thermal power-law emission scales as $dE/dt \propto M^{10/3}\omega^{16/3}$ , which distinguishes it from the thermal Hawking spectrum.

Sohrab Rahvar2026-06-17⚛️ gr-qc

Can a Slow and Strong Phase Transition in Neutron Stars Relieve Major Compact-Star Observation Tensions?

This paper proposes that neutron stars undergoing a slow, strong first-order hadron-quark phase transition can resolve conflicting observational tensions regarding compact star masses and radii by supporting extended stable hybrid branches that simultaneously accommodate the high mass of GW190814's secondary component and the unusually small radii of HESS J1731--347 and XTE J1814--338.

Chen Zhang2026-06-17⚛️ nucl-th

Shadow, Emission, and Strong-Field Lensing of Dilatonic Black Holes

This paper investigates the shadow, strong-field lensing, and emission properties of static, spherically symmetric dilatonic black holes, demonstrating that increasing charge and dilatonic coupling reduces the shadow size and using these findings to constrain model parameters against observational data from M87* and SgrA*.

Kuantay Boshkayev, Ainur Urazalina, Aidana Kurmanbek, Manas Khassanov, Daniya Utepova2026-06-17⚛️ gr-qc

Damped Harmonic Oscillator Dark Energy and the Hubble Tension

This paper proposes a dark energy model based on a damped harmonic oscillator equation, demonstrating that its underdamped solution can significantly alleviate the Hubble tension by yielding an $H_0$ value consistent with local measurements without incurring a statistical penalty relative to the standard $\Lambda$ CDM model, while also highlighting significant systematic discrepancies between different Type Ia supernova datasets.

Saddam Hussain, Simran Arora, Qiang Wu, Tao Zhu2026-06-17⚛️ gr-qc

The Pre-geometric Origin of Geometric Trinity of Gravity

This paper demonstrates that a pre-geometric gravity framework based on a Yang–Mills-like gauge formulation with spontaneous symmetry breaking can consistently generate the effective metric and classical dynamics underlying the Geometric Trinity of Gravity, thereby unifying General Relativity, Teleparallel Gravity, and Symmetric Teleparallel Gravity as different manifestations of a single pre-geometric origin.

Salvatore Capozziello, Giuseppe Meluccio2026-06-17⚛️ gr-qc

Joint reconstruction of $H(z)$ and $f\sigma_8(z)$ with physics informed neural networks

This paper demonstrates a proof of concept for jointly reconstructing the Hubble parameter $H(z)$ and growth rate $f\sigma_8(z)$ using physics-informed neural networks coupled via the linear growth equation, revealing a systematic tension with $\Lambda$ CDM predictions while confirming the method's robustness to different local $H_0$ priors.

Konstantinos F. Dialektopoulos2026-06-17⚛️ gr-qc

Synergy between CSST and future gravitational-wave detectors: Probing primordial black holes by cross-correlating dark sirens with galaxies

This paper demonstrates that cross-correlating galaxy surveys from the Chinese Space-station Survey Telescope (CSST) with future gravitational-wave detector networks, particularly the multi-band BDET2CE configuration, offers a powerful statistical method to identify primordial black holes by distinguishing their unique clustering biases from astrophysical black holes, potentially detecting PBH contributions as low as 20% of the total merger rate.

Ya-Nan Du, Ji-Yu Song, Jing-Fei Zhang, Xin Zhang2026-06-17⚛️ hep-ph

Action based approach to dissipative relativistic fluid systems

This paper develops a new action principle for relativistic dissipative two-fluid systems that treats dissipation geometrically through non-zero flux divergences, successfully recovering causal heat propagation and extending the Tolman red-shift condition while demonstrating the model's capacity to reproduce relativistic Navier-Stokes terms.

G. L. Comer, N. Andersson, T. Celora, I. Hawke2026-06-17⚛️ gr-qc

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