Physics:Quantum photon field
The quantum photon field is the quantized electromagnetic field. Its particle-like excitations are photons, while its field description carries information about electromagnetic modes, polarization, phase, energy, and momentum. The photon-field concept is the basis of quantum electrodynamics, quantum optics, lasers, spontaneous emission, and light-matter interaction.[1][2]
Modes and polarization
Quantizing the electromagnetic field decomposes it into modes, each of which can have discrete occupation numbers. A one-photon state is one excitation of a mode, while coherent light contains superpositions of many photon-number states.[3]
Gauge field
The photon field is an Abelian gauge field associated with electromagnetic interactions. Charged matter fields couple to it, producing absorption, emission, scattering, and electromagnetic forces.[4]
Optical interpretation
In quantum optics, the photon field is used to describe interference, squeezing, entanglement, single-photon sources, and measurement statistics. It links classical wave optics with discrete detector events.[5]
Description
photon field is a matter-scale concept used to organize how quantum theory describes atoms, particles, fields, condensed matter, plasma, or spacetime-related systems. In the Quantum Collection it is placed by scale so the reader can move from materials and molecules down to subatomic degrees of freedom.
Quantum context
At this scale, the relevant behavior is controlled by quantized states, interactions, conservation laws, and the way excitations or particles are observed. The concept is normally linked to measurable properties such as energy, momentum, charge, spin, spectra, scattering rates, or collective modes.
Role in the collection
This page provides a compact reference point for related pages in Book II. It should be read together with nearby matter-scale topics and the corresponding foundations in quantum mechanics.[6]
See also
Table of contents (84 articles)
Index
Full contents
References
- ↑ "Photon". https://en.wikipedia.org/wiki/Photon.
- ↑ Schwartz, Matthew D. (2014). Quantum Field Theory and the Standard Model. Cambridge University Press. ISBN 978-1-107-03473-0.
- ↑ Peskin, Michael E.; Schroeder, Daniel V. (1995). An Introduction to Quantum Field Theory. Addison-Wesley. ISBN 978-0-201-50397-5.
- ↑ "Review of Particle Physics". Physical Review D 110 (3): 030001. 2024. DOI 10.1103/PhysRevD.110.030001.
- ↑ "Photon". https://en.wikipedia.org/wiki/Photon.
- ↑ "Quantum mechanics". https://en.wikipedia.org/wiki/Quantum_mechanics.
Source attribution: Physics:Quantum photon field