Testing the Everett Interpretation of Quantum Mechanics with Cosmology

TL;DR

This paper argues that the Everett many-worlds interpretation of quantum mechanics can be empirically tested through cosmological observations, challenging the view that it is inherently untestable and discussing how multiverse theories can be falsified.

Contribution

It demonstrates that testing the Everett interpretation is feasible and compares its testability to other multiverse theories, clarifying misconceptions about its empirical status.

Findings

Everett interpretation is testable via cosmological data

Multiverse scenarios can be falsified through observational evidence

Testing complexity is comparable to other multiverse theories

Abstract

In this brief note, we argue that contrarily to what is still often stated, the Everett many-worlds interpretation of quantum mechanics is not in principle impossible to test. It is actually not more difficult (but not easier either) to test than most other kinds of multiverse theories. We also remind why multiverse scenarios can be falsified.