Quantum field theory describes particle interactions from "summary" of The Quantum Universe by Brian Cox,Jeff Forshaw
Quantum field theory is a framework that allows us to understand and describe the interactions between particles. It is considered one of the most successful theories in physics, encompassing both quantum mechanics and special relativity. In this theory, particles are not seen as individual entities but rather as excitations of underlying fields that permeate all of space. These fields are responsible for mediating the forces between particles, such as the electromagnetic force or the weak nuclear force. The key idea in quantum field theory is that particles can interact by exchanging virtual particles, which are disturbances in the underlying fields. For example, when two electrons repel each othe...
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