3 papers
hep-th2020
Lorentzian Vacuum Transitions: Open or Closed Universes?
Sebastian Cespedes, Senarath P. de Alwis, Francesco Muia +1
We consider the generalisation of quantum tunneling transitions in the WKB approximation to the time-independent functional Schrödinger and Wheeler-DeWitt equations. Following a Lo…
hep-th2020
On the time evolution of cosmological correlators
Sebastian Cespedes, Anne-Christine Davis, Scott Melville
Developing our understanding of how correlations evolve during inflation is crucial if we are to extract information about the early Universe from our late-time observables. To tha…
hep-th2018
Constraints on holographic multi-field inflation and models based on the Hamilton-Jacobi formalism
Ana Achucarro, Sebastian Cespedes, Anne-Christine Davis +1
In holographic inflation, the cosmological dynamics is postulated to be dual to the renormalization group flow of a Euclidean conformal field theory with marginally relev…