3 papers
gr-qc2026
Exploring quantum fields in rotating black holes
Christiane K. M. Klein
In this paper, we discuss the Unruh state for a free scalar quantum field on Kerr-de Sitter under the assumption of mode stability. We summarise the proof of its Hadamard property…
math-ph2026
Hadamard property of the Unruh state for massless fermions on Kerr spacetime : the large case
Dietrich Häfner, Christiane Klein
In a recent paper by Gérard, Häfner, and Wrochna, the Unruh state for massless fermions on a Kerr spacetime was constructed and the authors showed its Hadmard property in the cas…
gr-qc2025
The Teukolsky scalar as a gateway for quantizing gravity on rotating black holes
Christiane K. M. Klein
The quantization of linearized gravity on black hole spacetimes and the construction of states for that theory is a sought-after, yet difficult achievement. One of the main reasons…