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 proposes a tabletop quantum-optical simulator using entangled nonlinear biphoton sources to emulate Unruh-DeWitt detector dynamics, demonstrating that phase-controlled signal and idler modes can effectively reproduce relativistic phenomena such as vacuum-induced excitation, coherence harvesting, and field-induced entanglement.
This paper computes the first-order correction in quartic coupling to the entanglement entropy of a non-minimally coupled massive scalar across a Schwarzschild horizon, demonstrating that the resulting divergences are renormalized by bulk mass and Newton's constant counterterms while the finite correction vanishes for conformal coupling.
This paper presents a solution within Einstein-Dirac-Maxwell theory where an asymmetric wormhole supported by a complex spinor field and electromagnetic fields connects two universes with distinct physical parameters, effectively modeling a classical particle with spin by exhibiting Standard Model mass and charge at one end while displaying Planck-scale values at the other.
This paper proposes and validates a new thermodynamic inequality, , for rotating Anti-de Sitter black holes across various topologies and dimensions, demonstrating its role in preserving cosmic censorship and its compatibility with the reverse isoperimetric inequality.
This paper demonstrates that coherently combining a population of sub-threshold gravitational-wave signals from binary neutron star mergers can statistically constrain the maximum mass of hot, rapidly rotating neutron stars and the nuclear equation of state, potentially revealing evidence for first-order phase transitions in dense matter.
This paper investigates whether apparent deviations from the CDM model in dark energy dynamics reflect genuine phantom-like evolution or parametrization artifacts, finding that while flexible models like power-law forms mildly improve fits and consistently suggest phantom behavior at intermediate redshifts (), the statistical significance remains modest and the specific evolutionary details are not robustly constrained.
This paper investigates the cosmological gravitational production of stable spin-3/2 particles, termed "raritrons," demonstrating that their ability to constitute dark matter depends critically on the mass hierarchy relative to the inflationary Hubble scale, which governs the sound speed of the longitudinal mode and can lead to significant enhancements in particle production, particularly for lighter masses or time-dependent mass scenarios.
This paper reanalyzes the heavy binary black hole event GW231123 using a complete physical model to demonstrate that the event exhibits no significant eccentricity and that previous discrepancies in parameter estimates stem from waveform model disagreements regarding strong spin precession rather than orbital eccentricity.
This paper presents a preliminary data analysis pipeline for the Taiji space mission that successfully reconstructs the isotropic stochastic gravitational wave background, demonstrating its ability to recover both known and unknown spectral morphologies from simulated datasets while addressing the unique challenges of space-based noise separation.
This paper introduces a non-perturbative formalism inspired by Feshbach's projector method to compute 5-point scattering amplitudes and derive gravitational waveforms for arbitrary two-body trajectories by relating effective emission potentials to perturbative amplitudes and applying the KMOC framework.