A heat kernel technique is developed to compute the one-loop effective action for general nonlinear electrodynamics, yielding a0-a2 coefficients in the weak-field regime and all-order a0 for conformal cases with causality conditions for convergence.
Effective actions in supersymmetric gauge theories: heat kernels for non-minimal operators,
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Heat kernel approach to the one-loop effective action for nonlinear electrodynamics
A heat kernel technique is developed to compute the one-loop effective action for general nonlinear electrodynamics, yielding a0-a2 coefficients in the weak-field regime and all-order a0 for conformal cases with causality conditions for convergence.