5 papers
One-loop aspects of de Sitter axion wormholes
Victor Ivo, Haifeng Tang
We discuss aspects of the Euclidean path integral around axion-supported de Sitter wormholes, at one-loop order. We numerically compute the phase of the path integral around these…
Physical instabilities and the phase of the Euclidean path integral
Victor Ivo, Juan Maldacena, Zimo Sun
We compute the phase of the Euclidean gravity partition function on manifolds of the form . We find that the total phase is equal to the phase in pure gravity on $S…
The phase of charged Nariai solutions
Victor Ivo, Zimo Sun
In this note, we compute the phase of the one-loop Euclidean path integral around charged Nariai solutions in 4 dimensions, including both metric and gauge field fluctuations. Thes…
One loop aspects of Coleman de Luccia instantons at small backreaction
Victor Ivo
We discuss the Euclidean path integral around Coleman de Luccia instantons. We compute their contribution at the one-loop level, at leading order in the small backreaction limit. A…
The no boundary density matrix
Victor Ivo, Yue-Zhou Li, Juan Maldacena
We discuss a no-boundary proposal for a subregion of the universe. In the classical approximation, this density matrix involves finding a specific classical solution of the equatio…