Xerxes is a theoretical physicist. He worked on black holes and string theory during grad school. He did his postdoctoral research in computational neuroscience and complex systems. In addition to fundamental physics, he is interested in the philosophy and foundations of mathematics. He also maintains an interest in the problem of consciousness and intelligence, particularly in mathematical approaches to the mind-body problem. He is associate professor in UPF teaching Advanced Concepts in Cognitive Sciences and he is currently affiliated to Wolfram Physics Group, also collaborator of CBC, UPF