propagator
31Effective action — In quantum field theory, the effective action is a modified expression for the action, which takes into account quantum mechanical corrections, in the following sense: In classical mechanics, the equations of motion can be derived from the action …
32Invariance mechanics — In physics, invariance mechanics, in its simplest form, is the rewriting of the laws of quantum field theory in terms of invariant quantities only. For example, the positions of a set of particles in a particular coordinate system is not… …
33Relativistische Quantenfeldtheorie — Eine Quantenfeldtheorie (QFT) kombiniert Prinzipien klassischer Feldtheorien (zum Beispiel der Elektrodynamik) und der Quantenmechanik zur Bildung einer erweiterten Theorie. Quantenfeldtheorien gehen über die Quantenmechanik hinaus, indem sie… …
34Quantenfeldtheorie — Dieser Artikel wurde den Mitarbeitern der Redaktion Physik zur Qualitätssicherung aufgetragen. Wenn Du Dich mit dem Thema auskennst, bist Du herzlich eingeladen, Dich an der Prüfung und möglichen Verbesserung des Artikels zu beteiligen. Der… …
35Common integrals in quantum field theory — There are common integrals in quantum field theory that appear repeatedly.[1] These integrals are all variations and generalizations of gaussian integrals to the complex plane and to multiple dimensions. Other integrals can be approximated by… …
36propagateur — propagateur, trice [ prɔpagatɶr, tris ] n. • 1495; lat. propagator, trix ♦ Personne qui propage (une religion; une opinion, une coutume). Les missionnaires, propagateurs de la foi. Les Phéniciens « ont été les propagateurs de cette méthode… …
37Yukawa potential — A Yukawa potential (also called a screened Coulomb potential) is a potential of the form:V(r)= g^2 ;frac{e^{ mr{r}Hideki Yukawa showed in the 1930s that such a potential arises from the exchange of a massive scalar field such as the field of the… …
38On shell and off shell — In physics, particularly in quantum field theory, configurations of a physical system that satisfy classical equations of motion are called on shell, and those that do not are called off shell. For instance, in classical mechanics in the action… …
39Gauge fixing — Quantum field theory (Feynman diagram) …
40Scalar field theory — In theoretical physics, scalar field theory can refer to a classical or quantum theory of scalar fields. A field which is invariant under any Lorentz transformation is called a scalar , in contrast to a vector or tensor field. The quanta of the… …
