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.

Constraint on cosmological constant in generalized Skryme-teleparallel system

This paper extends the Einstein-Skyrme system to teleparallel gravity frameworks, demonstrating that while the TEGR model aligns with previous results for a positive cosmological constant, the generalized $f(T)$ gravity scenario imposes specific upper and lower bounds on the cosmological constant that depend on the model's nonlinearity parameter, thereby constraining the existence of black-hole solutions with fractional baryon numbers.

Krishnanand Karthikeyan, Mathew Thomas Arun2026-03-17⚛️ hep-th

Appearances are deceptive: Can graviton have a mass?

This paper demonstrates that while linear gravitational perturbations on cosmological backgrounds of massive fermionic fields appear to acquire an off-shell mass in the action, this mass vanishes at the level of the equations of motion, ensuring that gravitons remain massless on-shell even when the background is driven by one-loop fermion backreaction.

Leihua Liu, Tomislav Prokopec2026-03-17🔭 astro-ph

Krylov complexity of thermal state in early universe

This paper employs a purification scheme to analyze the Krylov complexity of thermal states across the early universe's inflationary, radiation-dominated, and matter-dominated eras, revealing an exponential growth of complexity and strong dissipation during inflation that transitions to saturation and weak dissipation in later epochs due to particle production.

Tao Li, Lei-Hua Liu2026-03-17⚛️ hep-ph

Bound states of massive complex ghosts in superrenormalizable quantum gravity theories\

This paper demonstrates that superrenormalizable quantum gravity theories with complex ghost masses, despite failing standard consistency criteria like the Källén-Lehmann representation, can confine unphysical massive excitations into normal composite bound states, a mechanism with significant cosmological implications.

Manuel Asorey, Gastao Krein, Miguel Pardina, Ilya L. Shapiro2026-03-17⚛️ gr-qc

Thermodynamics of Reissner-Nordstörm black bounce black hole

This paper investigates the thermodynamic properties of the Reissner-Nordström black bounce black hole, including its entropy, mass, temperature, free energy, and heat capacity, while analyzing their interrelationships through graphical methods and deriving logarithmic corrections to the entropy.

Feba C Joy, R Tharanath2026-03-17⚛️ gr-qc

Lorentzian homogeneous Ricci-flat metrics on almost abelian Lie groups

This paper studies Lorentzian left-invariant metrics on almost abelian Lie groups of dimension four or higher, constructing a geodesically complete, Ricci-flat, non-flat metric that generalizes the four-dimensional Petrov solution to arbitrary dimensions and admits closed timelike curves.

Yuichiro Sato, Takanao Tsuyuki2026-03-17⚛️ hep-th

Gravitational waves in massive Horndeski theory with a potential

This paper investigates gravitational waves in linearized Horndeski theory with an arbitrary potential, demonstrating that the potential's minimum acts as an effective cosmological constant that induces distinct frequency and wave number redshifts while influencing the speed and polarization of scalar waves.

Hatice Özer, Özgür Delice2026-03-17⚛️ gr-qc

Could Planck Star Remnants be Dark Matter?

This paper proposes that Planck Star Remnants, formed via nonsingular quantum bounces in Loop Quantum Cosmology that remain causally hidden and stable after black hole evaporation, constitute a viable candidate for dark matter consistent with current astrophysical constraints.

Oem Trivedi, Abraham Loeb2026-03-17🔭 astro-ph

Unveiling emergent internal time from entropy exchange in a cold-atom system

This paper experimentally demonstrates that a well-isolated cold-atom system can realize relational time by constructing an entropic clock from internal degrees of freedom, which successfully orders dynamical events and reproduces the system's evolution via an effective Schrödinger equation.

Giovanni Barontini2026-03-17⚛️ gr-qc

Thermodynamic Split Conjecture and an Observational Test for Cosmological Entropy

This paper proposes the Thermodynamic Split Conjecture, which asserts that black hole and cosmological horizon thermodynamics are fundamentally inequivalent in any UV-complete quantum gravity, and outlines a falsifiable observational test using tomographic entropy proxies to distinguish between these regimes and refine our understanding of cosmological horizon entropy.

Oem Trivedi2026-03-17⚛️ gr-qc

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