Most of my work is in the philosophy of science and metaphysics, though I have recently developed an interest in contemporary pragmatism. One aim of my earlier research in the philosophy of physics was to shed light on metaphysical topics such as holism, realism and causation. In The Philosophy of Quantum Mechanics, I developed an approach toward the understanding of quantum theory according to which the theory portrays a nonseparable world, but my view of quantum theory has changed since writing this book. My book, Gauging What’s Real, locates a different kind of nonseparability in contemporary gauge theories. I accepted the Lakatos Award for this book on May 14th, 2009. Since writing this book I have been exploring the relations between science and metaphysics from a broadly pragmatist perspective, and working on a book assessing the philosophical significance of the quantum revolution.

current projects

I am revising for publication a book "The Quantum Revolution in Philosophy", a self-contained but opinionated introduction to quantum theory and its significance for philosophy. It should appear by the end of 2016.

This was an outgrowth of earlier work on a project "Physics without Building Blocks" for which I received NSF support. One product of that research was a paper published in Studies in History and Philosophy of Modern Physics "Physical Composition". The project led in to my development of a pragmatist interpretation of quantum theory---a project supported in 2011-12 by a grant from the John Templeton Foundation. Some of this research was conducted as an occasional visitor to Anton Zeilinger's laboratory in Vienna. My first publication on this topic "Quantum theory: a Pragmatist Approach" appeared in the British Journal for the Philosophy of Science. Another paper appeared in Foundations of Physics Dispelling Feynman's mystery, and a third in Philosophy of Science Observation and Quantum Objectivity. Here are some more recently published papers: How Quantum Theory Helps us Explain, Quantum Meaning, Causality and Chance in Relativistic Quantum Field Theories, Quantum States as Objective Informational Bridges.

In Fall 2009 I visited the Perimeter Institute for Theoretical Physics where I gave two talks Reduction and Emergence in Bose-Einstein Condensates and What's Wrong with 'Measurement'?. You can see a more recent talk I gave there here. Together with Jos Uffink and Philip Stamp, I organized an interdisciplinary workshop on Part and Whole in Physics. This was sponsored by the Lorentz Center, and took place in Leiden, the Netherlands from March 22nd-26th, 2010.

Here's a paper I wrote in 2009, stimulated by a visit to Vienna: Reduction and Emergence in Bose-Einstein Condensates
I contributed this essay to a review symposium on Bas van Fraassen's Scientific Representation:
and another essay to Spinoza on Monism edited by Philip Goff.

older publications