User:Johnjbarton/sandbox/introduction to quantum mechanics: Difference between revisions

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=== Quantum radiation, quantum fields ===

{{main | History of quantum field theory}}

In 1923 [[Compton scattering| Compton]] demonstrated that the Planck-Einstein energy quanta from light also had momentum.; three Byyears later the "energy quanta" got a new name: it came to be called a "[[photon]]".<ref name="photon-named">.{{Cite web|url=https://www.aps.org/publications/apsnews/201212/physicshistory.cfm|title=December 18, 1926: Gilbert Lewis coins "photon" in letter to Nature| website=www.aps.org|language=en|access-date=2019-03-09}}</ref> Despite its role in almost all stages of the quantum revolution, no explicit model for light quanta existed until 1927 when [[quantum electrodyanmics |Paul Dirac]] dividedbegan thework electromagneticthat field intobecame [[quantum oscillators propagating waves when excited by the motion of charged particleselectrodynamics]]. Over the following decades this work evolved into [[quantum field theory]], the basis for modern [[quantum optics]] and [[particle physics]].