Covariant perturbation expansion of off-diagonal heat kernel
classification
❄️ cond-mat.stat-mech
hep-thmath-phmath.MPquant-ph
keywords
expansioncovariantperturbationheatkernelsoff-diagonalarbitrarycalculated
read the original abstract
Covariant perturbation expansion is an important method in quantum field theory. In this paper an expansion up to arbitrary order for off-diagonal heat kernels in flat space based on the covariant perturbation expansion is given. In literature, only diagonal heat kernels are calculated based on the covariant perturbation expansion.
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