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noun, Physics.
the quantum field theory that deals with the electromagnetic field and its interaction with electrons and positrons.
Abbreviation: QED.
(physics) a relativistic quantum mechanical theory concerned with electromagnetic interactions QED
quantum electrodynamics
A quantum field theory of electromagnetism that explains the interactions between electrically charged particles and photons. According to quantum electrodynamics, charged particles interact with one other by emitting or absorbing photons, which are the carriers of the electromagnetic force. Quantum electrodynamics correctly predicts such phenomena as the structure of atoms, and the creation and annihilation of particles (for example, when matter and antimatter collide). Quantum electrodynamics is one of the most well-tested, accurate, and successful theories in physics.


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  • Quantum electronics

    noun 1. the application of quantum mechanics and quantum optics to the study and design of electronic devices

  • Quantum-field-theory

    noun, Physics. 1. 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. noun 1. (physics) quantum mechanical theory concerned with elementary particles, which are represented by fields whose normal modes of […]

  • 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

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