- spin foam
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A topological structure made out of two-dimensional faces that represents one of the configurations that must be summed to obtain a Feynmans path integral description of quantum gravity.
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spin foam
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Spin foam — In physics, a spin foam is a topological structure made out of two dimensional faces that represents one of the configurations that must be summed to obtain a Feynman s path integral (functional integration) description of quantum gravity. It is… … Wikipedia
Spin-Schaum — Mit dem Begriff des Spin Schaums (engl. spin foam), der aus der Theorie der Schleifenquantengravitation (kurz LQG ) stammt, wird die Gesamtheit zeitlich sich entwickelnder Spin Netzwerke verstanden. Ein Spin Netzwerk ändert dabei gemäß der… … Deutsch Wikipedia
Spin network — In physics, a spin network is a type of diagram which can be used to represent states and interactions between particles and fields in quantum physics. From a mathematical perspective, the diagrams are a concise way to represent multilinear… … Wikipedia
NASA spin-off — Science and technology in the United States African American contributions Discoveries … Wikipedia
Loop quantum gravity — Not to be confused with the path integral formulation of LQG, see spin foam. This article is about LQG in its Canonical formulation.. Beyond the Standard Model … Wikipedia
Lorentz invariance in loop quantum gravity — Loop quantum gravity (LQG) is a quantization of a classical Lagrangian field theory. It is equivalent to the usual Einstein Cartan theory in that it leads to the same equations of motion describing general relativity with torsion. As such, it can … Wikipedia
Causal dynamical triangulation — Beyond the Standard Model Standard Model … Wikipedia
Spinschaum — Mit dem Begriff des Spin Schaums (engl. spin foam), der aus der Theorie der Schleifenquantengravitation (kurz LQG ) stammt, wird die Gesamtheit zeitlich sich entwickelnder Spin Netzwerke verstanden. Ein Spin Netzwerk ändert dabei gemäß der… … Deutsch Wikipedia
History of loop quantum gravity — General relativity is the theory of gravitation published by Albert Einstein in 1915. According to it, the force of gravity is a manifestation of the local geometry of spacetime. Mathematically, the theory is modelled after Bernhard Riemann s… … Wikipedia
Laurent Freidel — is a physicist, working at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario, Canada. He is working in loop quantum gravity and spin foam models of quantum gravity. He has recentlycoauthored a series of papers on the Ponzano… … Wikipedia
