3 papers
gr-qc2026
Freezing lakes as analogue models of CDM cosmology and beyond
Lorens F. Niehof, Ananya Venkatasubramanian, Federico Toschi +1
We extend previous conduction-based analogies between ice growth in a lake and cosmological expansion by incorporating buoyancy-driven heat transport. Reformulating the Stefan prob…
gr-qc2025
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…
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…