13 citations · 14 across the 6 of their papers we have counts for
3 papers · 1 filter
Explicit finite-time illustration of improper unitary evolution for the Klein--Gordon field in de Sitter space
William T. Emond, Christian Käding, Peter Millington
It is known that quantum field theories in curved spacetime suffer from a number of pathologies, including the inability to relate states on different spatial slices by proper unit…
Renormalization group flows from the Hessian geometry of quantum effective actions
Yannick Kluth, Peter Millington, Paul Saffin
We explore a geometric perspective on quantum field theory by considering the configuration space, where all field configurations reside. Employing -particle irreducible effecti…
Influence functionals, decoherence and conformally coupled scalars
Clare Burrage, Christian Käding, Peter Millington +1
Some of the simplest modifications to general relativity involve the coupling of additional scalar fields to the scalar curvature. By making a Weyl rescaling of the metric, these t…