|quantum field theory|
|physics quantum mechanical theory concerned with elementary particles, which are represented by fields whose normal modes of oscillation are quantized|
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.