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.

Structural Analysis of a Scalar-Tensor Realization of Interacting Dark Energy

This paper investigates a density-driven interacting dark energy model within a conformally coupled scalar-tensor framework, finding that current cosmological data show no significant preference over $\Lambda$ CDM and constrain the model to a hierarchical regime where the scalar field remains heavier than the Hubble scale, with the choice of a fixed versus variable activation index significantly affecting the posterior parameter constraints.

Pradosh Keshav MV, NS Kavya, Kenath Arun2026-03-27⚛️ gr-qc

A Graphical Coaction for FRW Wavefunction Coefficients

This paper demonstrates that the wavefunction of the universe for conformally coupled scalars in power-law FRW cosmologies satisfies a graphical coaction that reveals its complete analytic structure through acyclic minors of Feynman graphs, thereby reproducing known kinematic flows and simplifying the extraction of discontinuities across all particle multiplicities and loop orders.

Andrew McLeod, Andrzej Pokraka, Lecheng Ren2026-03-27⚛️ hep-th

Planar Black holes and Entanglement Entropy in Analog Gravity Models

This paper demonstrates that all planar black holes conformal to a Painlevé–Gullstrand line element can be realized as analogue metrics by constructing an explicit Lagrangian, while also introducing a concept of holographic entanglement entropy valid for arbitrary conformal and blackening factors.

Neven Bilić, Tobias Zingg2026-03-26⚛️ gr-qc

Primordial black hole formation in matter domination

This paper investigates primordial black hole formation during an early matter-dominated era, concluding that despite shape-dependent threshold variations, the required large amplitude of primordial fluctuations makes this mechanism barely more efficient than in radiation domination and predicts a slightly larger but still small dimensionless spin parameter.

Ehsan Ebrahimian, Ali Akbar Abolhasani, Mehrdad Mirbabayi2026-03-26⚛️ gr-qc

Bulk viscous cosmological models with a cosmological constant: Observational constraints

This study employs Bayesian inference on various cosmological datasets to demonstrate that bulk viscous cold dark matter models, while thermodynamically consistent and offering partial alleviation of the Hubble tension, ultimately fail to resolve the discrepancy or outperform the standard $\Lambda$ CDM model.

R. Noemí Villalobos, Yerko Vásquez, Norman Cruz, Carlos H. López-Caraballo2026-03-26⚛️ gr-qc

Exploration of Parameters in f(R,T) Gravity and Comparison with Type Ia Supernovae Data

This paper investigates the cosmological expansion of the universe within the framework of $f(R,T)$ gravity using the specific model $f(R,T)=R+\lambda T^\epsilon$ , demonstrating that while the model can fit Type Ia supernovae data for certain parameter ranges, it performs significantly worse than the standard cosmological model as the exponent $\epsilon$ approaches zero.

Vincent R. Siggia, Eric D. Carlson, P. Lee Pryor2026-03-26⚛️ gr-qc

Noncoincidence $f(Q)$ -Cosmology with Dark Matter Coupled to Gravity

This paper investigates FLRW cosmology in symmetric teleparallel $f(Q)$ gravity with a nonminimal dark matter coupling, demonstrating that the noncoincidence gauge enables a multi-scalar field representation where the coupling facilitates a viable matter-dominated era and late-time acceleration, with the de Sitter solution emerging as the unique future attractor for power-law theories.

A. Abebe, P. S. Apostolopoulos, A. Giacomini, G. Leon, F. Moncada, A. Paliathanasis2026-03-26⚛️ gr-qc

On regular black strings spacetimes in nonlinear electrodynamics

This paper investigates the coupling of General Relativity with Nonlinear Electrodynamics to address axial singularities in four-dimensional black strings, proving that regular purely electric configurations are impossible for Lagrangians recovering the Maxwell limit while simultaneously constructing and validating new exact regular solutions, such as cylindrical analogues of the Bardeen and Hayward metrics, that satisfy causality and unitarity constraints.

G. Alencar, V. H. U. Borralho, T. M. Crispim, M. S. Cunha2026-03-26⚛️ gr-qc

Energy conditions of bouncing solutions in quadratic curvature gravity coupled with a scalar field

This paper analyzes energy conditions in nonsingular bouncing cosmologies within quadratic curvature gravity coupled to a scalar field, revealing that while the scalar-field description satisfies most conditions except the strong one, the effective energy-momentum tensor approach violates all four conditions near the bounce, thereby highlighting the intrinsically non-Einsteinian nature required to avoid initial singularities.

Yuki Hashimoto, Kazuharu Bamba, Sanjay Mandal2026-03-26⚛️ gr-qc

Entanglement transference and non-inertial quantum reference frames

This paper establishes sufficient conditions for "entanglement transference," a phenomenon where global entanglement decomposes into perspectival entanglement and coherence, demonstrating that in non-inertial quantum reference frames, entanglement degradation can be offset by increased coherence resources.

Everett A. Patterson, Sijia Wang, Robert B. Mann2026-03-26⚛️ quant-ph

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