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.
(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.
- Quantum flavourdynamics
noun 1. a gauge theory of the electromagnetic and weak interactions Also called electroweak theory, QFD
- Quantum gravity
noun 1. (physics) a theory of the gravitational interaction that involves quantum mechanics to explain the force
noun, Physics. 1. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbreviation: QM. noun 1. (functioning as sing) the branch of mechanics, based on the quantum theory used for interpreting the behaviour of elementary particles and atoms, which do not obey Newtonian mechanics quantum […]
noun 1. Physics. an abrupt transition of a system described by quantum mechanics from one of its discrete states to another, as the fall of an electron in an atom to an orbit of lower energy. 2. any sudden and significant change, advance, or increase. quantum jump A change from one quantum state to another, […]