Dr. Nicholas Ormrod (Perimeter Institute, Canada & Department of Computer Science, University of Oxford, UK).
The emergence of classicality from causation.
I'll show how quantum causal influences (as defined by quantum causal models) can explain the emergence of the classical world. This will involve reformulating quantum theory in an observer-independent fashion by positing that causal structure is fundamental, and that events emerge out of it by striking a "causal balance." Time permitting, I'll reflect on some possible connections with SBS states, with the hope of stimulating discussions and collaborations between those working on causation and those working on SBS states.
‍Warsaw colloquium for theoretical physics at CTP PAS - 2025-01-22