General probabilistic theories: An introduction

Understand

We introduce the framework of general probabilistic theories (GPTs for short).

• GPTs are a class of operational theories that generalize both finite-dimensional classical and quantum theory, but they also include other, more exotic theories, such as the boxworld theory containing Popescu-Rohrlich boxes.
• We provide in-depth explanations of the basic concepts and elements of the framework of GPTs, and we also prove several well-known results.
• The review is self-contained and it is meant to provide the reader with consistent introduction to GPTs.