96 citations · 131 across the 3 of their papers we have counts for
13 papers
GRChombo: An adaptable numerical relativity code for fundamental physics
Tomas Andrade, Llibert Areste Salo, Josu C. Aurrekoetxea +29
GRChombo is an open-source code for performing Numerical Relativity time evolutions, built on top of the publicly available Chombo software for the solution of PDEs. Whilst GRChomb…
On the choice of entropy variables in multifield inflation
Michele Cicoli, Veronica Guidetti, Francesco Muia +2
We discuss the usefulness and theoretical consistency of different entropy variables used in the literature to describe isocurvature perturbations in multifield inflationary models…
dNNsolve: an efficient NN-based PDE solver
Veronica Guidetti, Francesco Muia, Yvette Welling +1
Neural Networks (NNs) can be used to solve Ordinary and Partial Differential Equations (ODEs and PDEs) by redefining the question as an optimization problem. The objective function…
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…
The Fate of Dense Scalar Stars
Francesco Muia, Michele Cicoli, Katy Clough +3
Long-lived pseudo-solitonic objects, known as oscillons/oscillatons, which we collectively call real scalar stars, are ubiquitous in early Universe cosmology of scalar field theori…
Cosmology in the presence of multiple light moduli
Bobby S. Acharya, Mansi Dhuria, Diptimoy Ghosh +2
The generic expectation in string/supergravity models is that there are multiple moduli fields with masses of the order of the supersymmetry breaking scale. We study the cosmology…