Gravitation & Nuclear · Physics & Astronomy
General Relativity & Quantum Cosmology
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130 papers, from 10 September 2026 to 5 November 2026: 130 arXiv preprints.
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Newest papers
Demystifying Graviton Detection
Detecting single gravitons is possible through the extraction of discrete energy quanta from passing gravitational waves.Testing Gravitationally-Induced-Entanglement with Massive Particles and Quantum Clocks
We present an experimental proposal to test whether gravity can entangle a levitated particle with an array of quantum clocks.Exact teleportation bounds for fermionic Hawking thermality beyond the single-mode approximation
Fermionic teleportation near a Schwarzschild horizon involves two physically distinct ingredients that are often varied together: Hawking thermal mixing and the relative composition of the right and…Unsupervised Neural Operators for Rotating Relativistic Stars: High-Fidelity Equation of State Inference and Pulsar Spin Evolution at Scale
Observed populations of rotating neutron stars~(NSs) with millisecond-order periods are powerful probes of fundamental physics.Constraining Lorentz Invariance Violation via Precision Atomic Spectroscopy
This paper investigates Lorentz violation arising from quantum gravity effects in electronic and muonic hydrogen atoms.Non-compact Kogut-Susskind gauge theories: 1D lattice models with exact ${\rm SL}(2,\mathbb{R})$ gauge invariance
The Kogut-Susskind (KS) formulation of gauge theories constructs quantum many-body Hamiltonians with gauge invariance under a compact Lie group exactly implemented on a spatial lattice.Probing gravity at megahertz frequencies with levitated rotors
The near-field gravitational interaction between masses is always thought of as instantaneous, an assumption experimentally tested only up to 1.7 kHz, where measurements yield a bounds at the…On Entanglement Dynamics in Holographic Theories
Entanglement entropy (EE) is central to modern theoretical physics, yet its calculation in interacting theories with nontrivial time dependence remains challenging.Constraint Variance Identity and the Matter-Geometry Fluctuation Relation
The quantum Hamiltonian constraint vanishes for physical states.Coherent detector responses to quantum-controlled spherical-shell geometries
A detector inside a static spherical shell samples globally matched field modes even though its local geometry is flat.Unruh-DeWitt detectors in a delocalized massive shell
We construct a model for the response of a detector to vacuum fluctuations inside a massive hollow shell in a superposition of positions.Improving Gravitationally Induced Entanglement in Interferometric Configurations
Proposals to detect gravitationally induced entanglement between massive particles offer a promising pathway toward probing the quantum nature of gravity.Motional Decoherence of the internal state of an atom by vacuum and thermal fluctuations of a quantum field: Necessity of a fully relativistic treatment
We consider a massive object, such as a neutral atom or an Unruh-DeWitt detector, moving at constant speed in a quantum field and investigate how motion affects the quantum coherence of its internal…Raychaudhuri-Ehlers Kinematics on Quantum State-Space: Caustics and Extrinsic Quantum Geometry
Quantum mechanics is inherently geometric in that the pure states form a curved complex manifold and the Schrödinger evolution defines a Hamiltonian flow on this space.Spacetime Emergence in the Memory of a Learning Agent
We show that the causal structure of spacetime can emerge within the memory of a learning agent performing a quantum information task.Mercury (Hg): a relativistic $N$-body simulation for Horndeski gravity
We present Mercury, a relativistic $N$-body code for cosmological simulations in the $α$-basis formulation of Horndeski gravity.Quantum Recovery from Black-Hole Radiation Beyond the Emission Yield
A proposed resolution of the black-hole information paradox must explain which information an outside observer can recover from escaping radiation\cite{Hawking,Page,Hayden,Almheiri}.Black Hole Love Numbers with Physics-Informed Neural Networks
We develop and validate a physics-informed neural network (PINN) framework for computing the tidal Love numbers of black holes directly from their perturbation equations.Detection times are not local observables in quantum field theory
Detection times are routinely recorded in quantum experiments.Induced Lorentzian geometry from the fermionic quantum metric
Quantum geometry is conventionally understood in parameter or momentum space and need not be related to a geometry in configuration space.