Representation of Physical Reality
In their presentations of fundamental interactions, written from the particle physics perspective, Gerard ’t Hooft and Martinus Veltman gave good arguments for taking the original, non-regularized Feynman diagrams as the most succinct representation of our present knowledge about the physics of quantum scattering of fundamental particles. Their motivations are consistent with the convictions of James Daniel Bjorken and Sidney Drell: ”The Feynman graphs and rules of calculation summarize quantum field theory in a form in close contact with the experimental numbers one wants to understand. Although the statement of the theory in terms of graphs may imply perturbation theory, use of graphical methods in the many-body problem shows that this formalism is flexible enough to deal with phenomena of nonperturbative characters ... Some modification of the Feynman rules of calculation may well outlive the elaborate mathematical structure of local canonical quantum field theory ...” So far there are no opposing opinions. In quantum field theories the Feynman diagrams are obtained from Lagrangian by Feynman Rules.
Read more about this topic: Feynman Diagram
Famous quotes containing the words representation of, physical and/or reality:
“America loves the representation of its heroes to be not just larger than life, but stupendously, awesomely bigger than anything else. If blue whales built statues to each other they’d be smaller then these.”
—Simon Hoggart (b. 1946)
“Adam and Eve, according to the fable, wore the bower before other clothes. Man wanted a home, a place of warmth, or comfort, first of physical warmth, then the warmth of the affections.”
—Henry David Thoreau (1817–1862)
“... the living, vital truth of social and economic well-being will become a reality only through the zeal, courage, the non-compromising determination of intelligent minorities, and not through the mass.”
—Emma Goldman (1869–1940)