Quantum Probabilities for the Causal Ordering of Events

Autor: Charis Anastopoulos, Maria-Electra Plakitsi
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Dynamics, Vol 3, Iss 4, Pp 695-710 (2023)
Druh dokumentu: article
ISSN: 2673-8716
DOI: 10.3390/dynamics3040037
Popis: We develop a new formalism for constructing probabilities associated with the causal ordering of events in quantum theory, where an event is defined as the emergence of a measurement record on a detector. We start with constructing probabilities for the causal ordering events in classical physics, where events are defined in terms of worldline coincidences. Then, we show how these notions generalize to quantum systems, where there exists no fundamental notion of trajectory. The probabilities constructed here are experimentally accessible, at least in principle. Our analysis here clarifies that the existence of quantum orderings of events do not require quantum gravity effects: it is a consequence of the quantum dynamics of matter, and it appears in the presence of a fixed background spacetime.
Databáze: Directory of Open Access Journals