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hep-th2025
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…
hep-th2025
Topological modes, non-locality and the double copy
William T. Emond, Laura Engelbrecht, Nathan Moynihan +1
The double copy connects scattering amplitudes and other objects in gauge and gravity theories. Open conceptual issues include whether non-local information in gravity theories can…