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Related to quantum electrodynamics: quantum field theory
n. (used with a sing. verb)
The quantum theory of the electromagnetic interaction and the properties and behavior of electrons, positrons, photons, and the electromagnetic field.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n (functioning as singular)
(Atomic Physics) physics a relativistic quantum mechanical theory concerned with electromagnetic interactions. Abbreviation: QED
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
(used with a sing. v.) the quantum-mechanical theory of the electromagnetic field and its interaction with electrons and positrons. Abbr.: QED
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||quantum electrodynamics - a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons|
quantum field theory - the branch of quantum physics that is concerned with the theory of fields; it was motivated by the question of how an atom radiates light as its electrons jump from excited states
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