Causality, Measurement, and Elementary Interactions

TL;DR

This paper explores how quantum measurement, causality, and relativity interconnect, proposing that nondeterministic entangling interactions prevent superluminal information transfer, with testable experimental implications.

Contribution

It introduces a hypothesis about nonlocal amplitude transfers during entangling interactions, linking causality with measurement and elementary interactions.

Findings

Nondeterminism in entanglement explains information hiding in elementary systems.

Nonlocal effects are unobservable in sequence due to nondeterminism.

Proposes experimental tests for nonlocal amplitude transfer hypothesis.

Abstract

Signal causality, the prohibition of superluminal information transmission, is the fundamental property shared by quantum measurement theory and relativity, and it is the key to understanding the connection between nonlocal measurement effects and elementary interactions. To prevent those effects from transmitting information between the generating and observing process, they must be induced by the kinds of entangling interactions that constitute measurements, as implied in the Projection Postulate. They must also be nondeterministic as reflected in the Born Probability Rule. The nondeterminism of entanglement-generating processes explains why the relevant types of information cannot be instantiated in elementary systems, and why the sequencing of nonlocal effects is, in principle, unobservable. This perspective suggests a simple hypothesis about nonlocal transfers of amplitude during entangling interactions, which yields straightforward experimental consequences.