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In particle physics, quantum electrodynamics ( QED) is the relativistic quantum field theory of electrodynamics. [1] [2] [3] 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. [2]
quantum electrodynamics (QED), quantum field theory of the interactions of charged particles with the electromagnetic field. It describes mathematically not only all interactions of light with matter but also those of charged particles with one another. QED is a relativistic theory in that Albert Einstein’s theory of special relativity is ...
- The Editors of Encyclopaedia Britannica
6. Quantum Electrodynamics. In this section we finally get to quantum electrodynamics (QED), the theory of light interacting with charged matter. Our path to quantization will be as before: we start with the free theory of the electromagnetic field and see how the quantum theory gives rise to a photon with two polarization states.
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Quantum electrodynamics, commonly referred to as QED, is a quantum field theory of the electromagnetic force. Taking the example of the force between two electrons, the classical theory of electromagnetism would describe it as arising from the electric field produced by each electron at the position of the other.
Quantum electrodynamics is an extremely rich and intricate theory, and we will leave out many important topics. Interested readers are referred to are Dyson’s 1951 lecture notes on quantum electrodynamics (Dyson 1951), and Zee’s textbook (Zee 2010). 5.1: Quantization of the Lorentz Force Law. 5.2: Dirac's Theory of the Electron.
Jan 31, 2024 · The theory of quantum electrodynamics, which describes interactions of electrically charged particles and light, has been checked to painstaking precision (SN: 2/23/23). The theory correctly ...
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Nov 10, 2023 · On the 75th anniversary of quantum electrodynamics, Chad Orzel reflects on the parallel work that led to the synthesis of the theory. Most physicists wouldn’t immediately think of 1948 as an ...
