Resummed relative entropy bounds the sign of asymptotic growth of EFT coefficients and detects nonperturbative instabilities such as the Schwinger effect via analytic continuation in fermionic QED.
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Bounds on nonlinear effective field theories via resurgent relative entropy
Resummed relative entropy bounds the sign of asymptotic growth of EFT coefficients and detects nonperturbative instabilities such as the Schwinger effect via analytic continuation in fermionic QED.