منابع مشابه
Superstrings from Supergravity
We study the origins of the five ten–dimensional “matrix superstring” theories, supplementing old results with new ones, and find that they all fit into a unified framework. In all cases the matrix definition of the string in the limit of vanishingly small coupling is a trivial 1+1 dimensional infra–red fixed point (an orbifold conformal field theory) characterized uniquely by matrix versions o...
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The four six–dimensional “little string” theories are all described in the infinite momentum frame (IMF) as matrix theories by non–trivial 1+1 dimensional infra–red fixed points. We characterize these fixed points using supergravity. Starting from the matrix theory definition of M5–branes, we derive an associated dual supergravity description of the fixed point theories, arising as the near hor...
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We derive harmonic superspaces for N = 2, 3, 4 SYM theory in four dimensions from superstring theory. The pure spinors in ten dimensions are dimensionally reduced and yield the harmonic coordinates. Two anticommuting BRST charges implement Grassmann analyticity and harmonic analyticity. The string field theory action produces the action and field equations for N=3 SYM theory in harmonic supersp...
متن کاملGrand Unified Theories From Superstrings
I review how traditional grand unified theories, which require adjoint (or higher representation) Higgs fields for breaking to the standard model, can be contained within string theory. The status (as of January 1996) of the search for stringy free fermionic three generation SO(10) SUSY–GUT models is discussed. Progress in free fermionic classification of both SO(10)2 charged and uncharged embe...
متن کاملTwisted spin Sutherland models from quantum Hamiltonian reduction
Recent general results on Hamiltonian reductions under polar group actions are applied to study some reductions of the free particle governed by the Laplace-Beltrami operator of a compact, connected, simple Lie group. The reduced systems associated with arbitrary finite dimensional irreducible representations of the group by using the symmetry induced by twisted conjugations are described in de...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1995
ISSN: 0550-3213
DOI: 10.1016/0550-3213(94)00539-q