In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics.[1]: xi QFT is used in particle physics to construct physical models of subatomic particles and in condensed matter physics to construct models of quasiparticles. The current standard model of particle physics is based on Quantum Field Theory.
QFT treats particles as excited states (also called quantum levels) of their underlying quantum fields, which are more fundamental than the particles. The equation of motion of the particle is determined by minimization of the action computed for the Lagrangian, a function of fields associated with the particle. Interactions between particles are described by interaction terms in the Lagrangian involving their corresponding quantum fields. Each interaction can be visually represented by Feynman diagrams according to perturbation theory in quantum mechanics.
^Peskin, M.; Schroeder, D. (1995). An Introduction to Quantum Field Theory. Westview Press. ISBN 978-0-201-50397-5.
and 25 Related for: Quantum field theory information
theoretical physics, quantumfieldtheory (QFT) is a theoretical framework that combines classical fieldtheory, special relativity, and quantum mechanics.: xi ...
In gauge theory and mathematical physics, a topological quantumfieldtheory (or topological fieldtheory or TQFT) is a quantumfieldtheory which computes...
string theory to another type of physical theory called a quantumfieldtheory. One of the challenges of string theory is that the full theory does not...
forces of nature are described within the framework of quantum mechanics and quantumfieldtheory: the electromagnetic interaction, the strong force, and...
application in the quantumfieldtheory of the weak force, and its unification with electromagnetism in the electroweak theory. Gauge theories became even more...
physics, scalar fieldtheory can refer to a relativistically invariant classical or quantumtheory of scalar fields. A scalar field is invariant under...
of all quantum physics, which includes quantum chemistry, quantumfieldtheory, quantum technology, and quantum information science. Quantum mechanics...
In quantumfieldtheory, the quantum vacuum state (also called the quantum vacuum or vacuum state) is the quantum state with the lowest possible energy...
Axiomatic quantumfieldtheory is a mathematical discipline which aims to describe quantumfieldtheory in terms of rigorous axioms. It is strongly associated...
A conformal fieldtheory (CFT) is a quantumfieldtheory that is invariant under conformal transformations. In two dimensions, there is an infinite-dimensional...
In theoretical physics, thermal quantumfieldtheory (thermal fieldtheory for short) or finite temperature fieldtheory is a set of methods to calculate...
relativistic quantumtheory work lead him to explore quantumtheories of radiation, culminating in quantum electrodynamics, the first quantumfieldtheory. The...
the proton, neutron and pion. QCD is a type of quantumfieldtheory called a non-abelian gauge theory, with symmetry group SU(3). The QCD analog of electric...
In particle physics, quantum electrodynamics (QED) is the relativistic quantumfieldtheory of electrodynamics. In essence, it describes how light and...
mathematical physics, constructive quantumfieldtheory is the field devoted to showing that quantumfieldtheory can be defined in terms of precise mathematical...
Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic...
Common integrals in quantumfieldtheory are all variations and generalizations of Gaussian integrals to the complex plane and to multiple dimensions.: 13–15 ...
effective fieldtheory is a type of approximation, or effective theory, for an underlying physical theory, such as a quantumfieldtheory or a statistical...
In physics, lattice fieldtheory is the study of lattice models of quantumfieldtheory. This involves studying fieldtheory on a space or spacetime that...
Global Information