What is quantum field theory?

Quantum field theory marries the ideas of other quantum theories to depict all particles as “excitations” that arise in underlying fields.

perturbative quantum field theory in nLab

Principles Of Physics: From Quantum Field Theory To Classical Mechanics (Second Edition) eBook by Jun Ni - EPUB Book

Quantum field: A revolution in Physics, by Parth Sarda

Visualization of Quantum Field Theory. Please be critical! : r/PhysicsStudents

Quantum Particles Aren't Spinning. So Where Does Their Spin Come

Quantum Field Theory I: Basics in Mathematics and Physics: A Bridge between Mathematicians and Physicists

Quantum Field Theory: An Introduction

Quantum Electrodynamics (QED)

The Origin of Mass - Quantum Field Theory