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In theoretical physics, the renormalization group (RG) is a formal apparatus that allows systematic investigation of the changes of a physical system as viewed at different scales. In particle physics , it reflects the changes in the underlying physical laws (codified in a quantum field theory ) as the energy (or mass) scale at which physical ...
In FRG, as in all RG methods, a lot of insight about a physical system can be gained from the topology of RG flows. Specifically, identification of fixed points of the renormalization group evolution is of great importance. Near fixed points the flow of running couplings effectively stops and RG -functions approach zero.
Renormalization is a collection of techniques in quantum field theory, statistical field theory, and the theory of self-similar geometric structures, that are used to treat infinities arising in calculated quantities by altering values of these quantities to compensate for effects of their self-interactions.
Robert Gilmour "R. G." LeTourneau (/ l ə t ˈ ər n oʊ /; November 30, 1888 – June 1, 1969), born in Richford, Vermont, was a prolific inventor of technologies related to earthmoving machinery, and founder of LeTourneau Technologies and LeTourneau University. [1]
A Gaussian fixed point is a fixed point of the renormalization group flow which is noninteracting in the sense that it is described by a free field theory. [1] The word Gaussian comes from the fact that the probability distribution is Gaussian at the Gaussian fixed point.
An Oregon man was arrested and charged Thursday for the murder of a car dealership owner who disappeared three years ago, police said Monday. Murphy Henry, 54, was also charged with abuse of a ...
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In statistical mechanics, a universality class is a collection of mathematical models which share a single scale-invariant limit under the process of renormalization group flow. While the models within a class may differ dramatically at finite scales, their behavior will become increasingly similar as the limit scale is approached.