quantum field theory Word Origin noun Physics.
- any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
Origin of quantum field theory First recorded in 1945–50 British Dictionary definitions for quantum field theory quantum field theory noun
- physics quantum mechanical theory concerned with elementary particles, which are represented by fields whose normal modes of oscillation are quantized
quantum field theory in Science quantum field theory
- The application of quantum mechanics to physical systems described by fields, such as electromagnetic fields. Quantum field theory was developed to overcome certain deficiencies in Schrödinger’s equation, in particular the fact that it was not consistent with special relativity and was difficult to apply to systems involving many particles or to the creation and destruction of particles. See also quantum chromodynamics quantum electrodynamics.