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What is quantum electrodynamics in particle physics?
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.
- The Editors of Encyclopaedia Britannica
Quantum Electrodynamics (QED) is defined as the most successful quantum field theory, particularly applied to simple atoms, enabling highly accurate theoretical predictions and precise experimental measurements in the field of precision physics.
May 27, 2024 · Quantum Electrodynamics (QED) represents a cornerstone of modern physics, intertwining the principles of quantum mechanics with classical electromagnetism. It’s a quantum field theory that describes how light and matter interact, providing a framework for understanding the electromagnetic force—one of the four fundamental forces in the ...
May 27, 2024 · Quantum Electrodynamics, commonly abbreviated as QED, is a cornerstone of modern physics and a fundamental part of the Standard Model of particle physics. It describes how light and matter interact and is the quantum theory of the electromagnetic force.
These lectures present a heuristic introduction to gauge theories of electromagnetic and strong interactions, focusing on perturbative applications of the S matrix and the use of Feynman graphs in QED and QCD. They are complementary to the presentations of field theory in the Standard Model and Quantum Field Theory courses at this School.
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.
