3 papers
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…
quant-ph2025
A quantum oscillator interacting with a classical oscillator
Muhammad Sajjad, Andrea Russo, Maite Arcos +2
We study a quantum oscillator interacting and back-reacting on a classical oscillator. This can be done consistently provided the quantum system decoheres, while the backreaction h…
hep-th2024
Renormalisation of postquantum-classical gravity
Andrzej Grudka, Tim R. Morris, Jonathan Oppenheim +2
One of the obstacles to reconciling quantum theory with general relativity, is constructing a theory which is both consistent with observation, and and gives finite answers at high…