QED

Q.E.D. English Pronunciation en /ˌkjuːiːˈdiː/ RP en En-uk-QED.oga RP en /ˌkjuˌiˈdi/ GA Etymology 1 From en quantum electrodynamics q(uantum) e(lectro)d(ynamics).n.2 yes 268897 December 2007 yes; abbrev Noun - en physics (Partial) en quantum electrodynamics 1. en W. B. Atwood Lepton Nucleon Scattering Ann Mosher Proceedings of Summer Institute on Particle Physics: July 9–20, 1979: Quantum Chromodynamics SLAC Report Springfield, Va. National Technical Information Service, U.S. Department of Commerce January 1980 part I (Lectures), section 3.1 (The General Scheme) 26 https://books.google.com/books?id=yPQnAQAAIAAJ&pg=PA26 1 918290331 QCD is a theory of quark interactions much analogous to QED: the interaction is carried by "gluons" (analogous to photons) which couple to the "color" (analogous to charge) of the quarks. en A[nthony] Zee Introduction to the 2006 Edition Richard P[hillips] Feynman QED: The Strange Theory of Light and Matter Princeton Science Library Princeton, N.J.; Woodstock, Oxfordshire w:Princeton University Press 2006 xii https://books.google.com/books?id=2o2JfTDiA40C&pg=PR12 978-0-691-12717-0 By the way, these days QED is considered a relatively simple example of a quantum field theory. en Brian Cox; w:Jeff Forshaw Interaction The Quantum Universe: Everything that Can Happen Does Happen London Allen Lane 2011 176 https://books.google.com/books?id=sMZWo90635oC&pg=PP221 978-1-84614-432-5 QED is the theory that explains how electrically charged particles, like electrons, interact with each other and with particles of light (photons). Pretty much everything else – certainly everything you see and feel around you – is explained at the deepest known level by QED. Matter, light, electricity and magnetism – it is all QED. en w:Abdus Salam Quantum Electrodynamics David L. Andrews Photonics: Scientific Foundations, Technology and Applications: Fundamentals of Photonics and Physics Hoboken, N.J. John Wiley & Sons 2015 I section 8.10 (Resonance Energy Transfer) 271 https://books.google.com/books?id=q7stBgAAQBAJ&pg=PA271 978-1-118-22553-0 Finally, there is still plenty of room to employ and apply QED theory for predictive purposes, by proposing new phenomena, especially within the realm of photonics, thereby ensuring QED remains relevant to current and future generations of researchers working in chemical physics. en James Everitt The Aim and Approach A Wave Theory of Universal Resonance: The Physical Basis of Quantum Electro-dynamics in the Cohesive Mechanics of a Unitary Universal Field [Munich, Bavaria] GRIN Verlag 2018 1 12 https://books.google.com/books?id=cwdQDwAAQBAJ&pg=PA12 978-3-668-65552-2 The aim of this work is essentially twofold: to establish the conception and thus model of a 'unitary universal cohesive field' from 'first principles' within which existing theories, primarily QED and the foundation of its approach, may be understood both in principle and therefore from any abstruse mathematical perspective extrapolated from it; en-US George Johnson Freeman Dyson, Math Genius Turned Technological Visionary, Dies at 96 The New York Times 2020-02-28 https://www.nytimes.com/2020/02/28/science/freeman-dyson-dead.html 0362-4331 Although his own early work on QED helped bring photons and electrons into a consistent framework, Dr. Dyson doubted that superstrings, or anything else, would lead to a Theory of Everything, unifying all of physics with a succinct formulation inscribable on a T-shirt. https://web.archive.org/web/20251203195903/https://www.nytimes.com/2020/02/28/science/freeman-dyson-dead.html 3 December 2025 Derived terms en cavity QED qQED<t:quenched quantum electrodynamics> Related terms en QCD (partial) initialism of en quantum chromodynamics Etymology 2 See en Q.E.D. Phrase phr en Q.E.D.; en quod erat demonstrandum 1. en Mr. Ash A New and Easy Way of Demonstrating Some Propositions in Euclid Philosophical Transactions: Giving Some Accompt of the Present Undertakings, Studies and Labours of the Ingenious in Many Considerable Parts of the World London Printed by T. R. for John Martyn, printer to the Royal Society; at the Bell in St. Pauls Church-Yard. 20 August 1684 XIV 162 674 https://books.google.com/books?id=wvwSuBLY6GgC&pg=RA1-PA674 630046584 [A]fter the ſame manner S and U are proved to be equal, therefore the ſquare of CB is equal to the ſquare of the 2 other ſides QED. The Ghastly Ordeal of Timothy Cavendish 147 Let me scotch that insidious little rumor implying Dermot’s invitation was my doing, that, oh, yes, Timothy Cavendish knew his author was lusting for a high-profile revenge, QED, the entire tragedy was a publicity stunt. Tosh dreamt up by jealous rivals! References Further reading quantum electrodynamics Q.E.D. Anagrams en deq DEQ Latin la: Phrase la phrase en QED quod erat demonstrandum la quod erat demonstrandum Descendants en QED quod erat demonstrandum Portuguese Etymology pt :lbor la:QED + 1 Phrase pt phrase pt science en QED pt CQD