Can somebody please let me know where I can find a reference for calculating heat kernel coefficients on a manifold with conical singularities? I am trying to compute the entanglement entropy for gauge fields using the heat kernel and the conical deficit angle method. I wanted to know how can I express the terms (in the entanglement entropy) beyond the leading UV divergent one in terms of invariants constructed out of the extrinsic and intrinsic curvature of the entangling region.
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