How to make unforgeable money in generalised probabilistic theories

Understand

We discuss the possibility of creating money that is physically impossible to counterfeit.

• Of course, "physically impossible" is dependent on the theory that is a faithful description of nature.
• Currently there are several proposals for quantum money which have their security based on the validity of quantum mechanics.
• In this work, we examine Wiesner's money scheme in the framework of generalised probabilistic theories.