Heat Kernel Coefficients for Chern-Simons Boundary Conditions in QED

Details Heat Kernel Coefficients for Chern-Simons Boundary Conditions in QED Heat Kernel Coefficients for Chern-Simons Boundary Conditions in QED

1998-09-30

arxiv.org/abs/hep-th/9809211v3

Physics

High Energy Physics

High Energy Physics - Theory

Several changes (including the title). Version to appear in Class Q. Grav. LaTeX, 12 pages

Scientific paper

10.1088/0264-9381/16/3/013

We consider the four dimensional Euclidean Maxwell theory with a Chern-Simons term on the boundary. The corresponding gauge invariant boundary conditions become dependent on tangential derivatives. Taking the four-sphere as a particular example, we calculate explicitly a number of the first heat kernel coefficients and obtain the general formulas that yields any desired coefficient. A remarkable observation is that the coefficient $a_2$, which defines the one-loop counterterm and the conformal anomaly, does not depend on the Chern-Simons coupling constant, while the heat kernel itself becomes singular at a certain (critical) value of the coupling. This could be a reflection of a general property of Chern-Simons theories.

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