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.

⚛️ high-energy theory

Near Extremal RN-AdS Control of Holographic Josephson Transport

This paper proposes a holographic model of Josephson transport in a Reissner–Nordstrom-AdS black brane background where a spatially inhomogeneous chemical potential creates a weak link, demonstrating that the near-extremal throat geometry controls the critical current and phase stiffness through the infrared scaling dimension of the charged scalar, thereby distinguishing genuine near-extremal effects from standard proximity suppression.

Ali Övgün, Reggie C. Pantig2026-06-08

⚛️ quantum physics

Amplitude-dependent quantum hydrodynamics from a $\coth$ -Madelung ansatz

This paper proposes a nonlinear extension of the Madelung transformation using a hyperbolic phase-amplitude coupling to derive amplitude-dependent quantum hydrodynamics that modifies the continuity and force equations, ultimately leading to density-gradient-sensitive corrections in the London equations and Meissner effect.

C. Dedes2026-06-08

⚛️ general relativity

Measuring a Black Hole's Area Immediately after Merger: A Direct-Wave Test of Hawking's Area Law

This paper introduces a gravitational-wave method to directly infer a black hole's horizon area from near-merger signals before quasinormal ringing dominates, demonstrating with event GW250114 that this approach yields an area consistent with the Kerr remnant and provides a novel test of Hawking's area law.

Adrian Ka-Wai Chung, Kelvin Ka-Ho Lam, Anna Liu, Nicolas Yunes2026-06-08

⚛️ general relativity

Stochastic scalar-tensor inflation and beyond

This paper extends the stochastic inflation paradigm to a wide class of fully nonlinear scalar-tensor theories by applying a gauge-agnostic coarse-graining procedure to the effective field theory of dark energy, thereby deriving consistent stochastic equations of motion for models such as Gauss-Bonnet, Horndeski, and multifield inflation within full General Relativity.

Yoann Launay2026-06-08

⚛️ general relativity

Generalized Lemaître time for rotating and charged black holes and its near-horizon properties

This paper investigates the behavior of generalized Lemaitre time for rotating and charged black holes, establishing a relationship between its finiteness, the forward-in-time condition, and kinematic censorship to provide a new explanation for why particle collisions inside the horizon cannot yield infinite center-of-mass energy.

A. V. Toporensky, O. B. Zaslavskii2026-06-05

⚛️ general relativity

Non-singular Bouncing Cosmology in $f(R,G,T)$ --Quintom model

This paper proposes a unified $f(R,G,T)$ -quintom framework that achieves a stable, non-singular bouncing cosmology with a novel double phantom divide line crossing, while demonstrating that FLRW symmetry constraints effectively suppress Ostrogradsky instabilities and ensure ghost-free dynamics.

Farzad Milani2026-06-05

⚛️ general relativity

Measurement of angular cross-correlation between the cosmological dispersion measure and the thermal Sunyaev--Zeldovich effect

This paper reports the first detection of a positive angular cross-correlation between fast radio burst dispersion measures and the thermal Sunyaev-Zeldovich effect, a finding that constrains the average electron temperature of the intergalactic medium and offers a new pathway to break degeneracies in cosmological parameters.

Ryuichi Takahashi, Kunihito Ioka, Masato Shirasaki, Ken Osato2026-06-05

⚛️ general relativity

Exceptional line and pseudospectrum in black hole spectroscopy

This paper reveals that black hole perturbations with Gaussian potential modifications exhibit a continuous line of exceptional points characterized by anisotropic spectral instability, where parameters along the line preserve quasinormal modes while deviations trigger $\epsilon^{1/2}$ scaling, accompanied by specific topological invariants and $\epsilon^{1/q}$ pseudospectrum growth that confirms enhanced spectral sensitivity at these non-Hermitian degeneracies.

Li-Ming Cao, Ming-Fei Ji, Liang-Bi Wu, Yu-Sen Zhou2026-06-05

⚛️ general relativity

Primordial Black Hole Formation in $f(R)=R+\alpha R^2$ Gravity: Perturbative and Non-Perturbative Analysis

This paper investigates primordial black hole formation in quadratic $f(R)$ gravity by combining a first-order perturbative analysis around General Relativity with a non-perturbative Einstein-frame numerical study of the scalaron field to determine the critical overdensity threshold for collapse.

G. G. L. Nashed, A. Eid2026-06-05

⚛️ phenomenology

Constant-roll $β$ -exponential inflation: Palatini formalism

This paper investigates the inflationary dynamics of a $\beta$ -exponential potential within non-minimally coupled quadratic gravity using the Palatini formalism and constant-roll condition, demonstrating that the model's predictions for spectral index, tensor-to-scalar ratio, and primordial non-Gaussianity are in excellent agreement with latest observational data from ACT DR6 and Planck.

Ozan Sargın2026-06-05

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gr-qc

Near Extremal RN-AdS Control of Holographic Josephson Transport

Amplitude-dependent quantum hydrodynamics from a coth⁡\cothcoth-Madelung ansatz

Measuring a Black Hole's Area Immediately after Merger: A Direct-Wave Test of Hawking's Area Law

Stochastic scalar-tensor inflation and beyond

Generalized Lemaître time for rotating and charged black holes and its near-horizon properties

Non-singular Bouncing Cosmology in f(R,G,T)f(R,G,T)f(R,G,T)--Quintom model

Measurement of angular cross-correlation between the cosmological dispersion measure and the thermal Sunyaev--Zeldovich effect

Exceptional line and pseudospectrum in black hole spectroscopy

Primordial Black Hole Formation in f(R)=R+αR2f(R)=R+\alpha R^2f(R)=R+αR2 Gravity: Perturbative and Non-Perturbative Analysis

Constant-roll βββ-exponential inflation: Palatini formalism

Amplitude-dependent quantum hydrodynamics from a $\coth$ -Madelung ansatz

Non-singular Bouncing Cosmology in $f(R,G,T)$ --Quintom model

Primordial Black Hole Formation in $f(R)=R+\alpha R^2$ Gravity: Perturbative and Non-Perturbative Analysis

Constant-roll $β$ -exponential inflation: Palatini formalism