4 papers · 1 filter
Stability of Axion-Dilaton Wormholes
Caroline Jonas, George Lavrelashvili, Jean-Luc Lehners
We study the perturbative stability of Euclidean axion-dilaton wormholes that asymptotically approach flat space, both with a massless and a massive dilaton, and focussing on homog…
A Zoo of Axionic Wormholes
Caroline Jonas, George Lavrelashvili, Jean-Luc Lehners
As was discovered some time ago by Giddings and Strominger (GS), an axion can support a wormhole geometry in the presence of a massless dilaton, as long as the dilaton coupling rem…
Cosmological consequences of a principle of finite amplitudes
Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Over 30 years ago, Barrow & Tipler proposed the principle according to which the action integrated over the entire 4-manifold describing the universe should be finite. Here we expl…
No-boundary solutions are robust to quantum gravity corrections
Caroline Jonas, Jean-Luc Lehners
The no-boundary proposal is a theory of the initial conditions of the universe formulated in semi-classical gravity, and relying on the existence of regular (complex) solutions of…