3949 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 analytically develops a measurement-based quantum estimation method using homodyne records and causal Wiener filters to verify mechanical oscillator states, demonstrating that reconstruction bias is negligible in typical regimes while clarifying its significance for macroscopic entanglement and momentum-squeezed state applications.
This paper reviews how viewing two-dimensional Einstein field equations as an integrable system enables the derivation of exact solutions through Wiener-Hopf matrix factorisation, highlighting recent interdisciplinary advances in operator theory and complex analysis that yield explicit gravitational solutions and new solution-generating methods.
This paper demonstrates that within generalized teleparallel gravity, a matter-bounce cosmological scenario naturally explains the current lack of observational evidence for the Kalb-Ramond field by confining its energy density to the bounce epoch, thereby favoring this model over a symmetric bounce.
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 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.
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.
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.
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.
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.
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.
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.