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

Curvatures and Non-metricities in the Non-Relativistic Limit of Bosonic Supergravity

This paper constructs a purely geometrical, metric-like formulation of the non-relativistic limit of bosonic supergravity based on a torsionless connection with non-vanishing non-metricities, which enables a manifestly covariant decomposition of relativistic curvature tensors and establishes an equivalence with string Newton–Cartan geometry while facilitating applications such as deriving $\alpha'$ -corrections and extending to general $f(R,Q)$ geometries.

Eric Lescano2026-04-02

⚛️ general relativity

Primordial black holes: constraints, potential evidence and prospects

This review summarizes current observational constraints on primordial black holes (PBHs) across the full mass range, discusses their formation scenarios and mass functions, highlights potential evidence for their existence as dark matter, and outlines future search prospects, particularly through gravitational-wave observatories.

Bernard Carr, Antonio J. Iovino, Gabriele Perna, Ville Vaskonen, Hardi Veermäe2026-04-02

⚛️ general relativity

Regular Black Strings and BTZ Black Hole in Unimodular Gravity Supported by Maxwell Fields

This paper demonstrates that within the framework of unimodular gravity, Maxwell electrodynamics can serve as a source for regular black strings and BTZ black holes, where the cosmological constant emerges as a radial-dependent vacuum contribution derived from the non-conservation of the energy-momentum tensor.

G. Alencar V. H. U. Borralho2026-04-02

🔭 astrophysics

Eppur non si trovano Vol. 2: No Planetary-mass Primordial Black Holes toward the Andromeda Galaxy

This paper refutes a recent claim that twelve short-timescale microlensing candidates in the Andromeda Galaxy indicate a population of planetary-mass primordial black holes, demonstrating instead that all candidates are variable stars and providing no evidence for such black holes as dark matter.

Przemek Mróz, Andrzej Udalski2026-04-02

⚛️ general relativity

Does a wormhole survive a cosmological bounce?

This paper demonstrates that specific dynamical wormhole solutions in Einstein's equations can persist through a cosmological bounce without undergoing topology change, remaining valid across contracting, expanding, and bouncing phases of the universe.

Daniela Pérez, Gustavo E. Romero, Santiago E. Perez Bergliaffa2026-04-02

⚛️ high-energy theory

The Observer Paradigm in Semiclassical Gravity: A Postmodern Perspective

This paper applies a postmodern and post-postmodern lens to semiclassical gravity, arguing that the inherent tension between observer-dependent and observer-free descriptions of closed universes should be embraced as a fundamental feature of quantum gravity rather than resolved.

Sean McBride2026-04-02

⚛️ general relativity

Thermodynamics of dynamical black holes beyond perturbation theory

This paper resolves the thermodynamic limitations of event horizons by demonstrating that quasi-local horizons allow for a robust formulation of the first and second laws of black hole mechanics applicable to dynamical black holes arbitrarily far from equilibrium, thereby identifying black hole entropy with the area of marginally trapped surfaces rather than the event horizon.

Abhay Ashtekar, Daniel E. Paraizo, Jonathan Shu2026-04-02

⚛️ high-energy theory

On Entropic Gravity from BFSS Matrix Theory

This paper uses numerical techniques on BFSS Matrix theory at strong coupling to demonstrate that the general relativistic force between two static objects emerges as an entropic force, thereby validating Verlinde's entropic gravity and the fuzzball paradigm while suggesting that black hole interiors are better described by AdS space rather than a traditional singularity.

Korin Aldam-Tajima, Vatche Sahakian2026-04-02

⚛️ general relativity

No-Go Theorem for Singularity Resolution

This paper establishes a No-Go theorem proving that within analytic gravitational theories, treating quantum corrections solely as effective matter sources is insufficient to resolve singularities in gravitational collapse, thereby necessitating non-analytic action modifications or vanishing effective energy density at high densities for successful singularity resolution.

Zhen-Xiao Zhang, Chen Lan, Yan-Gang Miao2026-04-02

⚛️ general relativity

Quantum Oppenheimer-Snyder primordial black holes as all the dark matter

This paper proposes that quantum Oppenheimer-Snyder primordial black holes, which exhibit suppressed Hawking emission due to quantum gravity corrections, can account for all dark matter by relaxing gamma-ray constraints and expanding the viable asteroid-mass window compared to standard Schwarzschild models.

Li-Shuai Wang, Xiangdong Zhang2026-04-02

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