## An Intuitive Explanation of Quantum Field Theory

This post will be my attempt to explain intuitively what is Quantum Field Theory. This idea came to me after reading two books: “QED: The Strange Theory of Light and Matter” by Richard Feynman, and “Quantum Field Theory in a Nutshell”, by A. Zee (that I only started). Both books use path integrals, but in a very different way: Feynman tells us that the particles can move anywhere they want in space and time, while Zee uses conventional ‘forward in time only’ paths but of a ‘mattress’ and not just one particle....