2 papers
hep-th2025
Semiclassical cosmic string evaporation
Robert Penna
We describe a new tunneling solution for the decay of a cosmic string into a burst of gravitational waves. We find the relevant instanton and compute the tunneling rate. Locally, o…
hep-th2025
families of Kerr black holes
Robert Penna
The stationary, axisymmetric sector of vacuum general relativity (with zero cosmological constant) enjoys an symmetry called the Matzner-Misner group. W…