quantum electrodynamics (QED)
- quantum electrodynamics (QED)
-
It describes the interactions of light with matter as well as those of charged particles with each other. Its foundations were laid by P. A. M. Dirac when he discovered an equation describing the motion and spin of electrons that incorporated both
quantum mechanics and the theory of special
relativity. The theory, as refined and developed in the late 1940s, rests on the idea that charged particles interact by emitting and absorbing photons. It has become a model for other quantum field theories.
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Universalium.
2010.
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Quantum electrodynamics — (QED) is a relativistic quantum field theory of electrodynamics. QED was developed by a number of physicists, beginning in the late 1920s. It basically describes how light and matter interact. More specifically it deals with the interactions… … Wikipedia
quantum electrodynamics — (QED) A relativistic quantum theory of electromagnetic interactions. It provides a description of the interaction of electrons, muons and photons and hence the underlying theory of all electromagnetic phenomena … Dictionary of automotive terms
quantum electrodynamics — Physics. the quantum field theory that deals with the electromagnetic field and its interaction with electrons and positrons. Abbr.: QED [1925 30] * * * ▪ physics quantum field theory of the interactions of charged (electric charge)… … Universalium
quantum electrodynamics — noun a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons • Syn: ↑QED • Hypernyms: ↑quantum field theory … Useful english dictionary
quantum electrodynamics — quan′tum electrodynam′ics n. phs (used with a sing. v.) the quantum mechanical theory of the electromagnetic field and its interaction with electrons and positrons Abbr.: QED • Etymology: 1925–30 … From formal English to slang
Circuit quantum electrodynamics — (circuit QED) provide the means to study the fundamental interaction between light and matter. As in the field of cavity quantum electrodynamics a single photon within a single mode cavity coherently couples to a quantum object (atom). In… … Wikipedia
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Quantum field theory — In quantum field theory (QFT) the forces between particles are mediated by other particles. For instance, the electromagnetic force between two electrons is caused by an exchange of photons. But quantum field theory applies to all fundamental… … Wikipedia
quantum field theory — 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. [1945 50] * * * Theory that brings quantum … Universalium
quantum chromodynamics — Physics. a quantum field theory that describes quarks and gluons and their interactions, with the color of the quarks playing a role analogous to that of electric charge. Abbr.: QCD Also called chromodynamics. Cf. color (def. 18). [1975 80] * * * … Universalium
