loop integral
11One-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… …
12Delay-locked loop — In electronics, a delay locked loop (DLL) is a digital circuit similar to a phase locked loop (PLL), with the main difference being the absence of an internal voltage controlled oscillator. A DLL can be used to change the phase of a clock signal… …
13Fresnel integral — S(x) and C(x) The maximum of C(x) is about 0.977451424. If πt²/2 were used instead of t², then the image would be scaled vertically and horizontally (see below). Fresnel integrals, S(x) and C(x), are two transcendental functions named aft …
14Renormalization — Quantum field theory (Feynman diagram) …
15List of mathematics articles (L) — NOTOC L L (complexity) L BFGS L² cohomology L function L game L notation L system L theory L Analyse des Infiniment Petits pour l Intelligence des Lignes Courbes L Hôpital s rule L(R) La Géométrie Labeled graph Labelled enumeration theorem Lack… …
16Dimensional regularization — Renormalization and regularization Renormalization Renormalization …
17Tadpole (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 …
18Pauli-Villars regularization — In theoretical physics, Pauli Villars regularization is a procedure that isolates divergent terms from finite parts in loop calculations in field theory in order to renormalize the theory. Wolfgang Pauli and Felix Villars published the method in… …
19Schwinger parametrization — is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops.Using the well known observation that:frac{1}{A^n}=frac{1}{(n 1)!}int^infty 0 du , u^{n 1}e^{ uA},Julian Schwinger noticed that one may simplify …
20Feynman 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… …
