alt. (context physics English) the study of the interaction of electromagnetic radiation with electrically charged matter within the framework of relativity and quantum mechanics n. (context physics English) the study of the interaction of electromagnetic radiation with electrically charged matter within the framework of relativity and quantum mechanics
n. a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons [syn: QED]
In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.
In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it "the jewel of physics" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.
Usage examples of "quantum electrodynamics".
Between them, quantum electrodynamics and quantum chromodynamics provide a full description of the subatomic world down to the scale at which we are able to measure.
During that first time in Brazil, which lasted six weeks, I was invited to give a talk at the Brazilian Academy of Sciences about some work in quantum electrodynamics that I had just done.
He all but rebuilt the theory of quantum electrodynamics and it was for this work that he shared the Nobel Prize in 1965.
His simplified rules of calculation became standard tools of theoretical analysis in both quantum electrodynamics and high-energy physics.
Kenneth Brewer once asked Freeman Dyson what it felt like when he had put together the puzzle of quantum electrodynamics and for a moment knew something that nobody else in the world knew.
Even Richard Feynman, winner of the Nobel prize in physics for his work in quantum electrodynamics, had maintained that nobody really understood quantum theory.
It exists in several dimensions including the subatomic quantum electrodynamics level of energy formation which we understand to require about ten dimensions, and sentience itself requires many of these dimensions.
It lives its brief solitary life, violating all the superstitions of quantum electrodynamics.