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.

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. We then describe how to couple the photon to fermions and to bosons.

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.

This chapter gives an introduction to quantum electrodynamics, the quantum theory of the electromagnetic field and its interactions with electrons and other charged particles. We begin by formulating a quantum Hamiltonian for an electron in a classical electromag-netic field.

2024年5月27日 · Quantum Electrodynamics (QED) is a cornerstone of modern physics, offering a comprehensive framework for understanding the interactions between light and matter. As a quantum field theory, QED extends classical electromagnetism to account for the quantum properties of particles and fields.

quantum electrodynamics (QED), Quantum theory of the interactions of charged particles with the electromagnetic field. It describes the interactions of light with matter as well as those of charged particles with each other.

2024年7月21日 · Quantum electrodynamics explains interactions between light and matter at the smallest scales. It incorporates particle-wave duality and quantum superposition. Virtual particles play a crucial role in fundamental interactions. Mathematical framework involves core equations and Feynman diagrams.

2025年1月1日 · The equations consist of laws of motion for electrons, positrons, photons, and electromagnetic fields, incorporating the principles of quantum mechanics and of special relativity. This theory of the third compartment is what we mean by quantum electrodynamics.

Quantum electrodynamics (QED) is a complex and highly mathematical theory regarding the interaction of electromagnetic radiation with matter. The development of QED theory was essential in the verification and development of quantum field theory and it allows physicists to predict how subatomic particles are created or destroyed.