For the historically-minded physicist: Dyson’s 1951 lectures on Advanced Quantum Mechanics (quantum field theory) are available on arXiv. I looked them over, and they seem eminently understandable to someone who’s had a course on quantum mechanics.

For the historically-minded physicist: Dyson’s 1951 lectures on Advanced Quantum Mechanics (quantum field theory) are available on arXiv. I looked them over, and they seem eminently understandable to someone who’s had a course on quantum mechanics.