6533b833fe1ef96bd129ca26
RESEARCH PRODUCT
One-Loop Effective Lagrangian in QED
Walter DittrichMartin Reutersubject
PhysicsLoop (topology)Section (fiber bundle)Mathematics::Functional AnalysisAmplitudeHigh Energy Physics::PhenomenologyEffective lagrangianExternal fieldMathematical physicsdescription
Our main goal in this section is the derivation of an expression for the effective Lagrangian in one-loop approximation. So let’s start with the vacuum persistence amplitude in presence of an external field: $$\displaystyle \langle 0_+\vert 0_-\rangle ^A = e^{ iW^{(1)}[A]} = e^{i \int d^4x\mathcal {L}^{(1)}(x)} $$
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |