Physics:Quantum matter field
A quantum matter field is a field whose excitations are interpreted as matter particles rather than force carriers. The term is a useful organizing idea in quantum field theory: electrons, quarks, and many effective quasiparticles can be described as excitations of matter fields, while interactions are mediated through gauge fields or other coupling fields.[1][2]
Fields before particles
In the field-theoretic view, particles are not independent little objects added to empty space. They are quantized excitations of underlying fields, with properties such as mass, charge, spin, and flavor determined by the field and its symmetries.[3]
Fermions and effective fields
Many fundamental matter fields are spinor fields describing fermions. In condensed matter and many-body physics, effective matter fields can also describe quasiparticles such as phonons, magnons, or collective excitations, depending on the system.[4]
Difference from gauge fields
Matter fields usually carry charges and transform under gauge symmetries, while gauge fields describe the connections that mediate interactions between charged fields. This distinction helps organize the Standard Model and many effective quantum theories.[5]
See also
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References
- ↑ "Quantum field theory". https://en.wikipedia.org/wiki/Quantum_field_theory.
- ↑ 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.
- ↑ "Quantum field theory". https://en.wikipedia.org/wiki/Quantum_field_theory.
- ↑ "Review of Particle Physics". Physical Review D 110 (3): 030001. 2024. DOI 10.1103/PhysRevD.110.030001.
Source attribution: Physics:Quantum matter field