Related papers: Quantum probabilities for the causal ordering of events

Quantum probabilities for the causal ordering of events

URL: http://arxiv.org/abs/2309.09541v1
Date: Mon, 18 Sep 2023 07:36:48 GMT
Title: Quantum probabilities for the causal ordering of events
Authors: Charis Anastopoulos and Maria_Electra Plakitsi
Abstract summary: We develop a new formalism for constructing probabilities associated to the causal ordering of events in quantum theory. We show how these notions generalize to quantum systems, where there exists no fundamental notion of trajectory.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We develop a new formalism for constructing probabilities associated to the causal ordering of events in quantum theory, where by an event we mean 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 does not require quantum gravity effects: it is a consequence of the quantum dynamics of matter, and it appears in presence of a fixed background spacetime.

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