I specialize in mathematical physics, in particular higher gauge theory. I have been using algebraic topology (mainly bundle theory and homotopy theory), differential geometry, higher category theory, harmonic analysis, spectral theory, and symplectic geometry in my research to answer questions in gauge theory, geometry, condensed matter, and information theory. I am also interested in the mathematical foundations of quantum theory, quantization itself, and quantum gravity including the information paradox.
Publications:
 Sufficient conditions for twodimensional localization by arbitrarily weak defects in periodic potentials with band gaps, with Karen K. Y. Lee, Yehuda Avniel, and Steven G. Johnson, Phys. Rev. B 81, 155324 (2010); doi: 10.1103/PhysRevB.81.155324

Gauge invariant surface holonomy and monopoles
Theory and Applications of Categories, Vol. 30, 2015, No. 42, pp 13191428.
Current projects:
 Categorical entropy
 Path integrals for surface holonomy (with V. P. Nair)
 The diagonal representation for group coherent states with applications to quantum optics and entropy (with V. P. Nair)
 Condensed matter for mathematicians with an emphasis on topological phases of matter
 Covering 2group 2bundles with connection
Other interests:
 The quantum Hall effect and gravity
 Nonabelian 2group DijkgraafWitten theory