Heat Kernel on Homogeneous Bundles over Symmetric Spaces

Details Heat Kernel on Homogeneous Bundles over Symmetric Spaces Heat Kernel on Homogeneous Bundles over Symmetric Spaces

2007-01-17

arxiv.org/abs/math/0701489v1

Comm. Math. Phys. (2008)

Mathematics

Analysis of PDEs

55 pages

Scientific paper

10.1007/s00220-008-0639-6

We consider Laplacians acting on sections of homogeneous vector bundles over symmetric spaces. By using an integral representation of the heat semi-group we find a formal solution for the heat kernel diagonal that gives a generating function for the whole sequence of heat invariants. We show explicitly that the obtained result correctly reproduces the first non-trivial heat kernel coefficient as well as the exact heat kernel diagonals on two-dimensional sphere $S^2$ and the hyperbolic plane $H^2$. We argue that the obtained formal solution correctly reproduces the exact heat kernel diagonal after a suitable regularization and analytical continuation.

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