quark-field operator

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• Quantum field theory — In quantum field theory (QFT) the forces between particles are mediated by other particles. For instance, the electromagnetic force between two electrons is caused by an exchange of photons. But quantum field theory applies to all fundamental… …   Wikipedia

• 't Hooft operator — In theoretical physics, a t Hooft operator, introduced by Gerard t Hooft in the 1978 paper On the phase transition towards permanent quark confinement is a dual version of the Wilson loop in which the electromagnetic potential A is replaced by… …   Wikipedia

• QCD vacuum — The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non perturbative vacuum state, characterized by many non vanishing condensates such as the gluon condensate or the quark condensate. These condensates… …   Wikipedia

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• 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

• Color charge — In particle physics, color charge is a property of quarks and gluons that is related to the particles strong interactions in the theory of quantum chromodynamics (QCD). Color charge has analogies with the notion of electric charge of particles,… …   Wikipedia

• Vacuum state — In quantum field theory, the vacuum state (also called the vacuum) is the quantum state with the lowest possible energy. Generally, it contains no physical particles. The term zero point field is sometimes used as a synonym for the vacuum state… …   Wikipedia

• Relativistische 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… …   Deutsch Wikipedia

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• BRST quantization — In theoretical physics, BRST quantization (where the BRST refers to Becchi, Rouet, Stora and Tyutin) is a relatively rigorous mathematical approach to quantizing a field theory with a gauge symmetry. Quantization rules in earlier QFT frameworks… …   Wikipedia

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