6 papers
Covariant variation for point-particle Lagrangians
Finnian Gray, Sebastian Murk, Daniel R. Terno
Structureless test particles in general relativity follow geodesics. For extended bodies, higher-order multipole moments lead to departures from geodesic motion; in particular, spi…
Hidden symmetries and separability structures of Ovcharenko-Podolský and conformal-to-Carter spacetimes
Finnian Gray, David Kubiznak, Hryhorii Ovcharenko +1
Recently, a remarkable new class of spacetimes describing black holes immersed in a non-aligned electromagnetic field has been found. While still of type D, this class goes beyond…
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…
Love symmetry in higher-dimensional rotating black hole spacetimes
Finnian Gray, Cynthia Keeler, David Kubiznak +1
We develop a method for constructing a 1-parameter family of globally-defined Love symmetry generators in rotating black hole spacetimes of general dimension. The key ingredient is…
The Unruh-DeWitt model and its joint interacting Hilbert space
Erickson Tjoa, Finnian Gray
In this work we make the connection between the Unruh-DeWitt particle detector model applied to quantum field theory in curved spacetimes and the rigorous construction of the spin-…
Homogeneous Symmetry Operators in Kerr--NUT--AdS Spacetimes
Finnian Gray, David Kubiznak
It is well known that the Kerr--NUT--AdS spacetimes possess hidden symmetries encoded in the so-called principal Killing--Yano tensor. In this paper, focusing on the four-dimension…