Categorical Quantum Mechanics I: Causal Quantum Processes

Understand

We derive the category-theoretic backbone of quantum theory from a process ontology.

• More specifically, we treat quantum theory as a theory of systems, processes and their interactions.
• In this first part of a three-part overview, we first present a general theory of diagrams, and in particular, of string diagrams.
• We discuss why diagrams are a very natural starting point for developing scientific theories.