Student Friendly Introduction to QFT · Problem 7.3

QED: Quantum Field Interaction Theory Applied to Electromagnetism

Physics — QFT · dirac-equation-from-lagrangian

Problem

Use the full e/m quantum Lagrangian (7-15) in the Euler-Lagrange equation (7-7) with

\phi^{n=1} = \overline{\psi}

to get the full Dirac equation (7-16).