3 papers
gr-qc2026
Higher-curvature corrections and the endpoint of black hole evaporation in gravitational effective field theory
Lorens F. Niehof, Sjors Heefer, Andrea Fuster +1
The endpoint of black hole evaporation remains uncertain once the semiclassical description approaches the Planck scale. In this work we study late-stage evaporation within four-di…
math-ph2026
Einstein-Kropina Metrics and Their Application in Finsler Gravity
Sjors Heefer, Fidel F. Villaseñor, Andrea Fuster
We generalize the Einstein condition for Kropina metrics obtained in the positive definite setting by Zhang, Shen and others to all signatures. As examples of Einstein-Kropina metr…
gr-qc2024
New class of non-Einstein pp-wave solutions to quadratic gravity
Sjors Heefer, Lorens F. Niehof, Andrea Fuster
We obtain a new family of exact vacuum solutions to quadratic gravity that describe pp-waves with two-dimensional wave surfaces that can have any prescribed constant curvature. Whe…