**Jeffrey Barrett** Much of Professor Barrett's work has focused on attempts to resolve the quantum measurement
problem in non-relativistic quantum mechanics and in quantum field theory. His most
recent work in this area has concerned Hugh Everett's interpretation of quantum mechanics.
He also has research interests in the proper metaphysics and epistemology of physics.

**John Manchak** Professor Manchak works on the foundations of general relativity, with a focus on
issues concerning the global topological and causal structure of spacetime. Some
of his recent work has concerned time travel and spacetime singularities.

**James Weatherall** Professor Weatherall works primarily on the mathematical and conceptual foundations
of classical field theories, including general relativity, Newton-Cartan theory, and
(classical) Yang-Mills theory, and on quantum field theory. Some topics of special
recent interest have included the role of geometry and symmetry in classical field
theories and the status of various central principles of these theories, such as the
"geodesic principle" of general relativity.

Penelope Maddy also shares some research interests with the members of this group, particularly in the question of how mathematics works in application to the world.

Current and recent students in this group include Benjamin Feintzeig (quantum mechanics, quantum field theory, Yang-Mills theory), Sarita Rosenstock (Yang-Mills theory, statistical mechanics), Marian Rogers (classical and quantum field theory, spontaneous symmetry breaking), and Sam Fletcher (general relativity, quantum gravity). Affiliated Faculty include Donald Saari and Daniel Whiteson. These faculty are among those available for course work and consultation for students pursuing the Physics Emphasis.

The philosophy of physics faculty members participate in an ongoing workshop series co-organized with Hans Halvorson (Princeton) and Giovanni Valente (Pittsburgh), called the Irvine-Pittsburgh-Princeton Conferences on the Conceptual and Mathematical Foundations of Physics. Recent events are listed below. They also maintain close ties with Charlotte Werndl (Salzburg) and her research group through the Salzburg Exchange Program. In addition, the Southern California Philosophy of Physics Group -- consisting of faculty, post-docs, and graduate students from colleges and universities throughout Southern California, including UCSD, UCLA, USC, Occidental, CSU LA, and Chapman -- meets two to three times per quarter at UC Irvine.

**Upcoming and Recent Workshops**

Relativistic Causality in Quantum Field Theory and General Relativity

Philosophy of Physics Workshop

**Ongoing Activities of the Physics Group**

Irvine-Pittsburgh-Princeton Conferences on the Conceptual and Mathematical Foundations of Physics

Southern California Philosophy of Physics Group

Philosophy of Physics Reading Group