3 papers
gr-qc2026
Emergence of phantom cold dark matter from spacetime diffusion
Jonathan Oppenheim, Emanuele Panella, Andrew Pontzen
General relativity can be reconciled with quantum field theory without quantising the geometry only if the metric evolves stochastically. In this article, we explore the consequenc…
hep-th2026
Stochastic modes in postquantum classical gravity
Jonathan Oppenheim, Muhammad Sajjad
We study fluctuations of the metric in the postquantum theory of classical gravity, a covariant theory which couples a classical spacetime with quantum matter fields. Mathematical…
gr-qc2025
Diffusion in the stochastic Klein-Gordon equation
Jonathan Oppenheim, Emanuele Panella
Theories of gravity in which the metric is fundamentally classical predict stochastic fluctuations in the gravitational field. In this article, we study the stochastic Klein-Gordon…