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Research paper thumbnail of Non-commutative geometry and string field theory

Nuclear Physics B, 1986

An attempt is made to interpret the interactions of bosonic open strings as defining a non-cummul... more An attempt is made to interpret the interactions of bosonic open strings as defining a non-cummulative, associative algebra, and to formulate the classical non-linear field theory of such strings in the language of non-commulative geometry. The point of departure is the BRST approach to string field theory. A setting is given in which there is a unique gauge invariant action, whose linearized approximation reproduces the conventional Veneziano spectrum. A derivation of conventional Veneziano model amplitudes from this gauge invariant action is sketched. Some brief comments are made about attempts to extend these results to open superstrings and to closed strings.

Research paper thumbnail of Charged black holes in string theory

Research paper thumbnail of De Sitter vacua in string theory

Research paper thumbnail of Large< i> N</i> field theories, string theory and gravity

Physics Reports-review Section of Physics Letters, 2000

Research paper thumbnail of Spontaneous breaking of Lorentz symmetry in string theory

Physical Review D, 1989

... This idea is made more plausible by the existence of compactified solutions that do not conta... more ... This idea is made more plausible by the existence of compactified solutions that do not contain tachyons even though the parent theories do.12 Internal symmetries may also be spontaneouslybroken in this cases. There remain several interesting areas for exploration. ...

Research paper thumbnail of Non-commutative geometry and string field theory

Nuclear Physics B, 1986

An attempt is made to interpret the interactions of bosonic open strings as defining a non-cummul... more An attempt is made to interpret the interactions of bosonic open strings as defining a non-cummulative, associative algebra, and to formulate the classical non-linear field theory of such strings in the language of non-commulative geometry. The point of departure is the BRST approach to string field theory. A setting is given in which there is a unique gauge invariant action, whose linearized approximation reproduces the conventional Veneziano spectrum. A derivation of conventional Veneziano model amplitudes from this gauge invariant action is sketched. Some brief comments are made about attempts to extend these results to open superstrings and to closed strings.

Research paper thumbnail of Charged black holes in string theory

Research paper thumbnail of De Sitter vacua in string theory

Research paper thumbnail of Large< i> N</i> field theories, string theory and gravity

Physics Reports-review Section of Physics Letters, 2000

Research paper thumbnail of Spontaneous breaking of Lorentz symmetry in string theory

Physical Review D, 1989

... This idea is made more plausible by the existence of compactified solutions that do not conta... more ... This idea is made more plausible by the existence of compactified solutions that do not contain tachyons even though the parent theories do.12 Internal symmetries may also be spontaneouslybroken in this cases. There remain several interesting areas for exploration. ...

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