- one-loop Feynman diagram
- однопетлевая диаграмма Фейнмана
English-russian dictionary of physics. 2013.
one-loop Feynman diagram
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One-loop Feynman diagram — In physics, a one loop Feynman diagram is a connected Feynman diagram with only one cycle (unicyclic). Such a diagram can be obtained from a connected tree diagram by taking two external lines of the same type and joining them together into an… … Wikipedia
Feynman diagram — The Wick s expansion of the integrand gives (among others) the following termNarpsi(x)gamma^mupsi(x)arpsi(x )gamma^ upsi(x )underline{A mu(x)A u(x )};,whereunderline{A mu(x)A u(x )}=int{d^4pover(2pi)^4}{ig {mu u}over k^2+i0}e^{ k(x x )}is the… … Wikipedia
Feynman — may refer to: * Richard Feynman ** Feynman diagram ** Feynman graph ** Feynman Kac formula ** The Feynman Lectures on Physics ** Feynman( s) (path) integral, see Path integral formulation ** Feynman parametrization ** Feynman checkerboard **… … Wikipedia
Loop quantum gravity — Not to be confused with the path integral formulation of LQG, see spin foam. This article is about LQG in its Canonical formulation.. Beyond the Standard Model … Wikipedia
Feynman parametrization — is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops. However, it is sometimes useful in integration in areas of pure mathematics too.Richard Feynman observed that::frac{1}{AB}=int^1 0… … Wikipedia
Loop integral — In quantum field theory and statistical mechanics, loop integrals are the integrals which appear when evaluating the Feynman diagrams with one or more loops by integrating over the internal momenta.There are two standard techniques for evaluating … Wikipedia
List of mathematical topics in quantum theory — This is a list of mathematical topics in quantum theory, by Wikipedia page. See also list of functional analysis topics, list of Lie group topics, list of quantum mechanical systems with analytical solutions. Contents 1 Mathematical formulation… … Wikipedia
Tadpole (physics) — In quantum field theory, a tadpole is a one loop Feynman diagram with one external leg, giving a contribution to a one point correlation function (i.e., the field s vacuum expectation value). One loop diagrams with a propagator that connects back … Wikipedia
Landau pole — In physics, Landau pole is the energy scale (or the precise value of the energy) where a coupling constant (the strength of an interaction) of a quantum field theory becomes infinite. Such a possibility was pointed out by the physicist Lev… … Wikipedia
Anomalous scaling dimension — In theoretical physics, by anomaly one usually means that the symmetry remains broken when the symmetry breaking factor goes to zero.When the symmetry which is broken is scale invariance, then true power laws usually cannot be found from… … Wikipedia
Semiclassical — In physics, the adjective semiclassical has different precise meanings depending on the context. All these meanings usually refer to some approximation, limit or situation that combines quantum and classical aspects in a given problem. Some of… … Wikipedia
