QBism and Relational Quantum Mechanics compared

TL;DR

This paper compares QBism and RQM, two interpretations of quantum mechanics that emphasize the observer-dependent nature of measurement outcomes, analyzing their similarities and differences in detail.

Contribution

It offers a comprehensive analysis of the conceptual distinctions and commonalities between QBism and RQM, clarifying their philosophical implications.

Findings

Both interpretations view measurement outcomes as observer-dependent events.

They differ in their treatment of the role of the observer and the nature of quantum states.

The paper highlights key conceptual distinctions and overlaps between QBism and RQM.

Abstract

The subjective Bayesian interpretation of quantum mechanics (QBism) and Rovelli's relational interpretation of quantum mechanics (RQM) are both notable for embracing the radical idea that measurement outcomes correspond to events whose occurrence (or not) is relative to an observer. Here we provide a detailed study of their similarities and especially their differences.