2649 papers
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.
This paper demonstrates that polariton condensates provide a unique platform for simulating analogue black hole mergers, showing that while pairs of vortices cannot form a common horizon, systems of four or more vortices can undergo a complete merger governed by a simple geometrical law.
Using first-principles lattice simulations of SU(3) Yang-Mills theory in Rindler spacetime, this study demonstrates that weak acceleration induces a spatially inhomogeneous confinement-deconfinement phase transition where distinct phases coexist, with a phase boundary consistent with theoretical predictions and a critical temperature matching that of non-accelerated gluodynamics.
This paper establishes that in asymptotically flat, spherically symmetric spacetimes satisfying the weak energy condition, the Schwarzschild solution sets the absolute upper bound for event horizon, photon sphere, and shadow radii, while also deriving specific bounds for extremal black holes and proving that the strong energy condition cannot be violated outside the event horizon.
This paper establishes global existence and decay properties for small-data solutions to a general class of coupled tensorial quasilinear wave equations in three dimensions that satisfy the weak-null condition but fail the standard null condition, by introducing a novel decoupling technique for higher-order energy estimates that overcomes limitations of previous methods.
The paper demonstrates that a causal diffeomorphism preserving the Ricci tensor between two spacetimes, where at least one admits a complete timelike geodesic, must necessarily be a homothety.
This paper derives a systematic framework for one-loop effective potentials in curved spacetimes and demonstrates that, for scalar theories in de Sitter and anti-de Sitter backgrounds, the computed -functions and anomalous mass dimensions coincide exactly with their flat-space counterparts despite significant curvature-induced modifications to physical masses and couplings.
This paper provides a comprehensive review of analogue Hawking radiation in nonlinear quantum optics, outlining the theoretical concepts of the gravitational analogy and chronicling the timeline of key fiber-optical experiments from 2008 to the present.
This paper demonstrates within the holographic QCD framework that the ground state in a strong magnetic field and finite baryon density is a chiral soliton lattice, which is interpreted as uniformly distributed D4-branes and unified through five-dimensional instanton charge, leading to a magnetic-field-dependent pion decay constant that qualitatively agrees with lattice QCD results.
This paper investigates how modeling quark deconfinement in neutron stars via higher-order phase transitions, rather than a traditional first-order transition, influences binary merger dynamics and the interpretation of future gravitational wave observations.
This paper demonstrates that the trace-free Einstein tensor cannot be derived from any local action functional via variation with respect to the metric, even when the requirement of diffeomorphism invariance is removed.