3 papers
gr-qc2025
Covariant path integrals for quantum fields back-reacting on classical space-time
Jonathan Oppenheim, Zachary Weller-Davies
We introduce configuration space path integrals for quantum fields interacting with classical fields. We show that this can be done consistently by proving that the dynamics are co…
quant-ph2025
Path integrals for classical-quantum dynamics
Jonathan Oppenheim, Zachary Weller-Davies
Consistent dynamics which couples classical and quantum degrees of freedom exists. This dynamics is linear in the hybrid state, completely positive and trace preserving. Starting f…
quant-ph2024
A healthier semi-classical dynamics
Isaac Layton, Jonathan Oppenheim, Zachary Weller-Davies
We study the back-reaction of quantum systems onto classical ones. Taking the starting point that semi-classical physics should be described at all times by a point in classical ph…