8 papers
Quantum fields in boson star spacetime
Paul M. Saffin, Qi-Xin Xie
Boson stars have been extensively studied in classical gravity, but their quantum properties remain comparatively unexplored. In this paper, we compute the quantum scalar fields an…
Matter Sourced Bubble Nucleation in the Asymmetron Scalar-Tensor Theory
Usama Syed Aqeel, Clare Burrage, Oliver Gould +1
We investigate how matter density distributions affect thin-wall bubble formation in the asymmetron mechanism, a scalar-tensor theory with a universal coupling to matter and explic…
Oscillons and bubbles in -ball dynamics
D. Canillas MartÃnez, P. Dorey, T. RomaÅczukiewicz +3
We show that, in the thin-wall regime, -ball--anti--ball collisions reveal chaotic behaviour. This is explained by the resonant energy transfer mechanism triggered by the int…
Quantum correlations in a gravitational collapse simulation with SpheriCo.jl
Benjamin Berczi, Magdalena Eriksson, Thanasis Giannakopoulos +1
We report on work using a newly developed code, SpheriCo.jl, that computes the gravitational collapse of a spherical scalar field, where the scalar can be either a classical field,…
Computing real-time quantum path integrals on Sewed, almost-Lefschetz thimbles
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We present a method to compute real-time path integrals numerically, by Monte-Carlo sampling on near-Lefschetz thimbles. We present a collection of tools based on the Lefschetz thi…
Do we live on the End of the World?
Benjamin Muntz, Antonio Padilla, Paul M. Saffin
We propose a scenario of a de Sitter universe living on an End-of-the-World brane. Motivated by the Swampland programme and in particular the Cobordism Conjecture, we consider a co…