Quantum field theory revolutionized understanding of particles from "summary" of The Quantum Theory of Fields by Steven Weinberg,Weinberg S
Quantum field theory has transformed our understanding of particles. This theory has its roots in the work of Dirac and Heisenberg, who independently developed the first versions of quantum field theory in the late 1920s. However, it was not until the 1940s and 1950s that the theory matured into a fully-fledged framework for describing elementary particles and their interactions. The key idea behind quantum field theory is that particles are excitations of underlying fields that permeate all of space. These fields are described by mathematical equations, and particles arise as quantized excitations of these fields. In this way, particles are no longer seen as fundamental entities but rather as manifestations of underlying fields. One of the major achievements of quantum field theory is the unification of seemingly different fo...
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