Spacetime in Everett's interpretation of quantum mechanics

TL;DR

The paper explores how Everett's interpretation of quantum mechanics, which posits multiple simultaneous outcomes, influences different conceptualizations of spacetime.

Contribution

It analyzes the relationship between multiplicity in Everett's interpretation and various perspectives on the nature of spacetime.

Findings

Different views on multiplicity lead to distinct spacetime conceptions

The interpretation impacts how measurement outcomes relate to spacetime structure

The paper clarifies philosophical implications of Everett's interpretation on spacetime

Abstract

Everett's interpretation of quantum mechanics was proposed to avoid problems inherent in the prevailing interpretational frame. It assumes that quantum mechanics can be applied to any system and that the state vector always evolves unitarily. It then claims that whenever an observable is measured, all possible results of the measurement exist. This assertion of multiplicity has been understood in many ways by proponents of Everett's theory. Here we shall illustrate how different views on multiplicity carry onto different views on spacetime.