worldsheet — noun A two dimensional manifold which describes the embedding of a string in spacetime, a direct generalization of the worldline of a particle in special and general relativity … Wiktionary
String theory — This article is about the branch of theoretical physics. For other uses, see String theory (disambiguation). String theory … Wikipedia
Polyakov action — In physics, the Polyakov action is the two dimensional action of a conformal field theory describing the worldsheet of a string in string theory. It was introduced by S.Deser and B.Zumino and independently by L.Brink, P.Di Vecchia and P.S.Howe… … Wikipedia
Relationship between string theory and quantum field theory — Many first principles in quantum field theory are explained, or get further insight, in string theory: * Emission and absorption: one of the most basic building blocks of quantum field theory, is the notion that particles (such as electrons) can… … Wikipedia
Non-critical string theory — The non critical string theory describes the relativistic string without enforcing the critical dimension. Although this allows the construction of a string theory in 4 spacetime dimensions, such a theory usually does not describe a Lorentz… … Wikipedia
GSO projection — The GSO projection (named after Ferdinando Gliozzi, Joël Scherk, and David A. Olive) is an ingredient used in constructing a consistent model in superstring theory. The projection is a selection of a subset of possible vertex operators in the… … Wikipedia
Super Virasoro algebra — In mathematical physics, a super Virasoro algebra is an extension of the Virasoro algebra to a Lie superalgebra. There are two extensions with particular importance in superstring theory: the Ramond algebra (named after Pierre Ramond) and the… … Wikipedia
Virasoro algebra — In mathematics, the Virasoro algebra (named after the physicist Miguel Angel Virasoro) is a complex Lie algebra, given as a central extension of the complex polynomial vector fields on the circle, and is widely used in string theory.DefinitionThe … Wikipedia
Dilaton — In particle physics, a dilaton is a hypothetical particle. It also appears in Kaluza Klein theory s compactifications of extra dimensions when the volume of the compactified dimensions vary. It is a particle of a scalar field Φ; a scalar field… … Wikipedia
Postulates of special relativity — See also: Special relativity Postulates of special relativity 1. First postulate (principle of relativity): The laws by which the states of physical systems undergo change are not affected, whether these changes of state be referred to the one or … Wikipedia
