quantum electrodynamics - définition. Qu'est-ce que quantum electrodynamics
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Qu'est-ce (qui) est quantum electrodynamics - définition


Quantum electrodynamics         
  • Addition of probability amplitudes as complex numbers
  • [[Compton scattering]]
  • [[Paul Dirac]]
  • [[Electron self-energy]] loop
  • [[Feynman diagram]] elements
  • Los Alamos]].
  • Feynman replaces complex numbers with spinning arrows, which start at emission and end at detection of a particle. The sum of all resulting arrows gives a final arrow whose length squared equals the probability of the event. In this diagram, light emitted by the source '''''S''''' can reach the detector at '''''P''''' by bouncing off the mirror (in blue) at various points. Each one of the paths has an arrow associated with it (whose direction changes uniformly with the ''time'' taken for the light to traverse the path). To correctly calculate the total probability for light to reach '''''P''''' starting at '''''S''''', one needs to sum the arrows for ''all'' such paths. The graph below depicts the total time spent to traverse each of the paths above.
  • [[Hans Bethe]]
  • Multiplication of probability amplitudes as complex numbers
ABELIAN GAUGE THEORY DESCRIBING QUANTUM INTERACTIONS OF THE ELECTROMAGNETIC FIELD WITH MATTER
Quantum Electrodynamics; Quantum electro-dynamics; Quantum electrodynamic; Quantum electro dynamics; Quantum magnetodynamics; QMD; History of quantum electrodynamics
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.
quantum electrodynamics         
  • Addition of probability amplitudes as complex numbers
  • [[Compton scattering]]
  • [[Paul Dirac]]
  • [[Electron self-energy]] loop
  • [[Feynman diagram]] elements
  • Los Alamos]].
  • Feynman replaces complex numbers with spinning arrows, which start at emission and end at detection of a particle. The sum of all resulting arrows gives a final arrow whose length squared equals the probability of the event. In this diagram, light emitted by the source '''''S''''' can reach the detector at '''''P''''' by bouncing off the mirror (in blue) at various points. Each one of the paths has an arrow associated with it (whose direction changes uniformly with the ''time'' taken for the light to traverse the path). To correctly calculate the total probability for light to reach '''''P''''' starting at '''''S''''', one needs to sum the arrows for ''all'' such paths. The graph below depicts the total time spent to traverse each of the paths above.
  • [[Hans Bethe]]
  • Multiplication of probability amplitudes as complex numbers
ABELIAN GAUGE THEORY DESCRIBING QUANTUM INTERACTIONS OF THE ELECTROMAGNETIC FIELD WITH MATTER
Quantum Electrodynamics; Quantum electro-dynamics; Quantum electrodynamic; Quantum electro dynamics; Quantum magnetodynamics; QMD; History of quantum electrodynamics
¦ plural noun [treated as sing.] a theory concerned with the electromagnetic field and its interaction with electrically charged particles.
Cavity quantum electrodynamics         
QUANTUM PHYSICS OF LIGHT AND MATTER IN A CAVITY
Cavity QED
Cavity quantum electrodynamics (cavity QED) is the study of the interaction between light confined in a reflective cavity and atoms or other particles, under conditions where the quantum nature of photons is significant. It could in principle be used to construct a quantum computer.