In theoretical physics, background field method is a useful procedure to calculate the effective action of a quantum field theory by expanding a quantum field around a classical "background" value B:
.
After this is done, the Green's functions are evaluated as a function of the background. This approach has the advantage that the gauge invariance is manifestly preserved if the approach is applied to gauge theory.
and 23 Related for: Background field method information
physics, backgroundfieldmethod is a useful procedure to calculate the effective action of a quantum field theory by expanding a quantum field around a...
nearly the only exponents of field theory, but in 1951 he found a way around the problem of the infinities with a new method using external sources as currents...
In quantum field theory, the quantum vacuum state (also called the quantum vacuum or vacuum state) is the quantum state with the lowest possible energy...
Gauge theories may be quantized by specialization of methods which are applicable to any quantum field theory. However, because of the subtleties imposed...
formulated quantum field theories in curved spacetime. These theories rely on general relativity to describe a curved background spacetime, and define...
In physics, specifically field theory and particle physics, the Proca action describes a massive spin-1 field of mass m in Minkowski spacetime. The corresponding...
{\displaystyle \phi } line could be attached. This is very similar to the backgroundfieldmethod which can also be used to calculate the effective action. Alternatively...
theory is a topological field, which when quantized, becomes a topological quantum field theory. BF stands for backgroundfield B and F, as can be seen...
program or film. Current methods may involve painting primarily background keys or the establishing shot while production background artists paint the corresponding...
made systematic. Although this method is not sufficiently concrete to allow the actual construction of effective field theories, the gross understanding...
This method was further used by Paul Dirac in the context of quantum field theory, in his construction of quantum electrodynamics. In the field theory...
a free field is a field without interactions, which is described by the terms of motion and mass. In classical physics, a free field is a field whose equations...
processor Foreground-background segmentation, a method for studying change blindness using photographs with distinct foreground and background scenery Foreground...
integral (at both large and small frequencies). As mentioned above, this method is expected to be valid only when ν > π c / a 0 {\displaystyle \nu >\pi...
quantum field theory, it is known as canonical quantization, in which the fields (typically as the wave functions of matter) are thought of as field operators...
located in Lancaster University Backgroundfieldmethod, a procedure to calculate the effective action of a quantum field theory Bacterial flagellar motor...
In quantum field theory, the Casimir effect (or Casimir force) is a physical force acting on the macroscopic boundaries of a confined space which arises...
analytic field theories. In lattice QCD, fields representing quarks are defined at lattice sites (which leads to fermion doubling), while the gluon fields are...
Renormalization is a collection of techniques in quantum field theory, statistical field theory, and the theory of self-similar geometric structures,...
In quantum field theory the vacuum expectation value (also called condensate or simply VEV) of an operator is its average or expectation value in the...
In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one...
particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter...
Global Information
