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gr-qc2025

Differentiability and Other Properties of the Cosmological Volume Function

Leonardo García-Heveling

In a previous work, the regular cosmological volume function was introduced as an alternative to the regular cosmological time function of Andersson, Galloway, and Howard. Bu…

gr-qc2025★ 5 cited

Conserved quantities and integrability for massless spinning particles in general relativity

Lars Andersson, Finnian Gray, Marius A. Oancea

In general relativity, the dynamics of spinning particles is governed by the Mathisson-Papapetrou-Dixon equations, which are most commonly applied to massive bodies, but the framew…

gr-qc2025

Looking through the Kerr disk

Maciej Maliborski, Tobias C. Sutter

We study null geodesics that connect the two asymptotically flat regions of the maximally extended Kerr spacetime. These vortical geodesics traverse both horizons and pass through…

gr-qc2025

Quantum interferometry in external gravitational fields

Thomas B. Mieling, Thomas Morling, Christopher Hilweg +1

Current models of quantum interference experiments in external gravitational fields lack a common framework: while matter-wave interferometers are commonly described using the Schr…

gr-qc2025

Geodesic causality in Kerr spacetimes with

Giulio Sanzeni, Karim Mosani

The analytic extension of the Kerr spacetimes into the negative radial region contains closed causal curves for any non-zero rotation parameter and mass parameter . Furtherm…

gr-qc2025

On a lower-dimensional Killing vector origin of irreducible Killing tensors

Finnian Gray, Gloria Odak, Pavel Krtouš +1

Considering a spacetime foliated by co-dimension-2 hypersurfaces, we find the conditions under which lower-dimensional symmetries of a base space can be lifted up to irreducible Ki…