Quantum causal models via QBism: the short version

TL;DR

This paper summarizes a proposed quantum causal model based on QBism, emphasizing its core physical properties and symmetry under causal inversion, with detailed mathematics provided separately.

Contribution

It introduces a minimal, physically motivated definition of quantum causal models within the QBism framework, highlighting their symmetry properties.

Findings

Quantum causal models exhibit symmetry under causal inversion.

The model emphasizes essential physical properties with minimal background.

Mathematical structures are detailed in the appendix.

Abstract

This paper is a concise summary of the main ideas presented in the companion paper `Quantum causal models via Quantum Bayesianism'[arXiv:1806.00895]. I present the proposed definition of a quantum causal model with minimal background and justification, focusing only on its essential physical properties. The mathematical structure and definitions are provided as an Appendix. I discuss the possible physical significance of the fact that the model is symmetric under causal inversion.