Search results
Results from the WOW.Com Content Network
The Schwinger–Dyson equations (SDEs) or Dyson–Schwinger equations, named after Julian Schwinger and Freeman Dyson, are general relations between correlation ...
In scattering theory, a part of mathematical physics, the Dyson series, formulated by Freeman Dyson, is a perturbative expansion of the time evolution operator in the interaction picture. Each term can be represented by a sum of Feynman diagrams .
The Dyson V8 is an upgraded version of the V6 with better battery life (up to 40 mins without the brush heads), [13] a larger dust cup capacity, modifications to the debris emptying process (Called the "Hygienic dirt ejection system"), and reported quieter operation than its predecessor due to a different noise frequency and noise dampening ...
By utilizing the interaction picture, one can use time-dependent perturbation theory to find the effect of H 1,I, [15]: 355ff e.g., in the derivation of Fermi's golden rule, [15]: 359–363 or the Dyson series [15]: 355–357 in quantum field theory: in 1947, Shin'ichirÅ Tomonaga and Julian Schwinger appreciated that covariant perturbation ...
Schwinger effect (Schwinger pair production) Schwinger function; Schwinger limit; Schwinger model; Schwinger parametrization; Schwinger representation; Schwinger reversed-phase coupler; Schwinger variational principle; Schwinger's quantum action principle; Schwinger–Dyson equation; Schwinger–Tomonaga equation; Fock–Schwinger gauge; Jordan ...
From the mathematical point of view the Lippmann–Schwinger equation in coordinate representation is an integral equation of Fredholm type. It can be solved by discretization . Since it is equivalent to the differential time-independent Schrödinger equation with appropriate boundary conditions, it can also be solved by numerical methods for ...
Dyson originated several concepts that bear his name, such as Dyson's transform, a fundamental technique in additive number theory, [5] which he developed as part of his proof of Mann's theorem; [6] the Dyson tree, a hypothetical genetically engineered plant capable of growing in a comet; the Dyson series, a perturbative series where each term ...
The technique of renormalization, suggested by Ernst Stueckelberg and Hans Bethe and implemented by Dyson, Feynman, Schwinger, and Tomonaga compensates for this effect and eliminates the troublesome infinities. After renormalization, calculations using Feynman diagrams match experimental results with very high accuracy.