1.4k citations · 7.3k across the 85 of their papers we have counts for
5 papers · 1 filter
Euclidean axion wormholes have multiple negative modes
Thomas Hertog, Brecht Truijen, Thomas Van Riet
We show that Euclidean axion wormholes in theories of gravity coupled to a single axion have several independent inhomogeneous perturbations that lower the Euclidean action. Our an…
What is the No-Boundary Wave Function of the Universe?
Jonathan J. Halliwell, James B. Hartle, Thomas Hertog
We specify the semiclassical no-boundary wave function of the universe without relying on a functional integral of any kind. The wave function is given as a sum of specific saddle…
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Damped perturbations in the no-boundary state
Juan Diaz Dorronsoro, Jonathan J. Halliwell, James B. Hartle +3
We evaluate the no-boundary path integral exactly in a Bianchi IX minisuperspace with two scale factors. In this model the no-boundary proposal can be implemented by requiring one…
Interactions resolve state-dependence in a toy-model of AdS black holes
Adam Bzowski, Alessandra Gnecchi, Thomas Hertog
We show that the holographic description of a class of AdS black holes with scalar hair involves dual field theories with a double well effective potential. Black hole microstates…