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The effective two-loop Euler-Heisenberg action for scalar and spinor QED in a general constant background field
European Physical Journal C: Particles and Fields
Using the Worldline formalism of QED we compute the two-loop effective action induced by a charged scalar, respectively spinor particle in a general constant electromagnetic field.doi:10.1007/pl00021617 fatcat:iberfaqxjnfidd3eppa3ond5dm