 We started a phenomenon, the phenomenon of localization, which is a typical thing that deals with the solid state physics using the language of gauge theories, which is instead a language typical of particle physics. And the merging of these two concepts on physical phenomenon and language allow us to, from the one end, understand the fact that using these concepts is actually very useful to understand physical phenomena. But beyond that, it even allowed direct insight on these physical phenomena by employing numerical simulations that otherwise would have been very hard. Ron Brennes was a student at the Master in Performance Computing, which is a joint initiative of many institutions here in Trieste. Marlon came from Costa Rica with a fellowship directly sponsored by CDP. In this thesis he developed a tool which was very useful then for us, and when Marlon decided to stay few more months to perform research at CDP, this tool that he developed during this thesis allowed us to perform simulations that would have been otherwise impossible. I think it was late January 2017, beginning of February. After having some chats with Antonio, we realized that there was a problem that was extremely interesting, but at that time we left the methods to study. But Marlon was the guy that actually could do it, because he developed some of these methods with his thesis. So after talking to him, we convinced him through the support of Nando Kevedo, the director of CDP, to stay few more months with us until the end of July. And then we started our collaboration. It was actually quite quick. I mean Marlon kept all the concepts very quickly, and in the range of three months we had all the calculations done. We understood the physics and then we wrote the master. The master on his own is an initiative which is partly sponsored by CDP. There are many people that are directly involved into that. From the other hand, this is not only an institutional teaching initiative, it's also something where the mission of CDP becomes very clear, because for instance we support students that come from developed countries directly to get the kind of education that will be otherwise very hard to get. A specific profile in high-performance computing that can be useful to both continue new computational studies in physics or computer science, or to just move to industry for instance.