Current Focus
Research interests concern foundational and philosophical problems of modern physics, especially quantum mechanics and quantum field theory, quantum logic, interpretation of probability, and theories of probabilistic causation.
Work also examines how formal methods in mathematical physics connect to conceptual and methodological questions in philosophy of science.
Selected Research Threads
- Quantum logic and algebraic methods: developed in Quantum Logic in Algebraic Approach (Kluwer, 1998), including hidden-variable issues and common-cause questions in relativistic quantum field theory.
- John von Neumann studies: research on von Neumann's work in foundations of physics, including edited volumes and John von Neumann: Selected Letters (AMS, 2005).
- Common cause principle: systematic analysis of probabilistic causation in The Principle of the Common Cause (Cambridge University Press, 2013).
Ongoing Themes
- Foundational questions in quantum theory and relativistic quantum field theory.
- Probability, causation, and formal constraints on explanations in physics.