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Showing posts from July, 2023

Student-Friendly Quantum Field Theory Vol 1: At Last, Someone Gets It!

An experience that the vast  majority  of physics graduate students have all shared over the last 60 years or so is the shared excitement, challenge, and more often than not agony of taking a quantum field theory course.  Most institutions (bar a few notable exceptions), ensures the first foray into QFT that a student encounters, is one which covers the canonical quantisation approach (over the more alien, yet more universally useful path integral approach).   The most sensible approach (which, happenstance is the most centrally used) I have seen to date, is to begin with an advanced review of special relativity; an introduction to classical field theory; an overture of Noether symmetries; the Klein-Gordon Equation; Green's functions and propagators; the Dirac Equation; CPT symmetries, with the lecture series ending on the S-Matrix and calculation of Feynman rules (with the optional addition of quantum electrodynamics). Accompanying such lecture courses, is a lo...