Double-sided Feynman diagrams for the density matrices ... with the wavy lines their photon propagators.
Feynman propagators; the interaction picture and the S-matrix expansion in perturbation theory and the Wick's Rule. Feynman diagrams and rules for calculating S-matrix elements in QED; formulas for ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback