37 citations · 107 across the 7 of their papers we have counts for
7 papers
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…
Uses of Complex Metrics in Cosmology
Caroline Jonas, Jean-Luc Lehners, Jerome Quintin
Complex metrics are a double-edged sword: they allow one to replace singular spacetimes, such as those containing a big bang, with regular metrics, yet they can also describe unphy…
Revisiting the no-boundary proposal with a scalar field
Caroline Jonas, Jean-Luc Lehners, Vincent Meyer
Recent works have suggested that the no-boundary proposal should be defined as a sum over regular, not necessarily compact, metrics. We show that such a prescription can be impleme…
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…
Transition from inspiral to plunge into a highly spinning black hole
Geoffrey Compère, Kwinten Fransen, Caroline Jonas
We extend the Ori-Thorne-Kesden procedure to consistently describe the non-quasi-circular transition around the ISCO from inspiral to plunge into a black hole of arbitrary spin, in…