Joshua Rosaler


My research focuses on questions about the methodology of reduction in physics, including specific issues in the foundations of quantum mechanics, quantum field theory, and renormalization theory. Much of this work seeks to clarify the nature of the relationship whereby one theory in physics may wholly encompass the domain of validity of another - which is often purported to hold between quantum and classical mechanics, relativistic and non-relativistic theories, and between any viable theory of quantum gravity and currently established theories of physics. A large portion of my research has focused on case studies involving the relationship between classical and quantum theories, seeking to understand how the unique difficulties associated with collapse of the quantum state during "measurement" figure into efforts to subsume classical behavior, and macroscopic phenomena more generally, into the domain of quantum theory. Currently, I am a postdoctoral fellow on the DFG-funded "Epistemology of the Large Hadron Collider" project, focusing on the naturalness principle in particle physics and its connection to various topics in the foundations of renormalization theory. I completed my doctorate at the University of Oxford under the supervision of David Wallace and Simon Saunders. Before coming to Oxford, I obtained my masters degree from Columbia University under David Albert and Allan Blaer, and my bachelors degree at Harvard University, where I worked as a computer programmer in the High Energy Physics Laboratory.