= Quantum Field Theory by David Tong
{c}
{tag=Work by David Tong}
Authored Cambridge DAMTP lecture notes: https://www.damtp.cam.ac.uk/user/tong/qft.htm
Chapter 1, Classical Field Theory: https://www.damtp.cam.ac.uk/user/tong/qft/qfthtml/S1.html
Chapter 6, Quantum Electrodynamics: https://www.damtp.cam.ac.uk/user/tong/qft/qfthtml/S6.html
Cited sections are 1.1, 1.3.4, 6.1.1 and 6.3.2. The current signs in any application must follow its stated phase and covariant-derivative convention.
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