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hep-ph2002
Two-Loop Self-Dual QED
Gerald V. Dunne, Christian Schubert
We present explicit closed-form expressions for the two-loop Euler-Heisenberg Lagrangians in a constant self-dual field, for both spinor and scalar QED. The simplicity of these rep…
hep-ph1998
On the Calculation of QED Amplitudes in a Constant Field
Christian Schubert
It is explained how first-quantized worldline path integrals can be used as an efficient alternative to Feynman diagrams in the calculation of QED amplitudes and effective actions.…