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Conformal invariance, supersymmetry and string theory
Covariant quantization of string theories is developed in the context of conformal field theory and the BRST quantization procedure. The BRST method is used to covariantly quantize superstrings, andExpand
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A New Hat For The c=1 Matrix Model
We consider two dimensional supergravity coupled to $\hat c=1$ matter. This system can also be interpreted as noncritical type 0 string theory in a two dimensional target space. After reviewing andExpand
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The Conformal Field Theory of Orbifolds
A prescription for the calculation of any correlation function in orbifold conformal field theory is given. The method is applied to the scattering of four twisted string states, which allows theExpand
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The Annular Report on Non-Critical String Theory
Recent results on the annulus partition function in Liouville field theory are applied to non-critical string theory, both below and above the critical dimension. Liouville gravity coupled to $c\leExpand
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Localized Tachyons and RG Flows
We study condensation of closed string tachyons living on defects, such as orbifold fixed planes and Neveu-Schwarz fivebranes. We argue that the high energy density of localized states decreases inExpand
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On the relevance of tachyons
We study condensation of open string tachyons using renormalization group flow in the worldsheet field theory. This approach leads to a simple picture of the physics of the nontrivial condensate.
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AdS Dynamics from Conformal Field Theory
We explore the extent to which a local string theory dynamics in anti-de Sitter space can be determined from its proposed Conformal Field Theory (CFT) description. Free fields in the bulk areExpand
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D-branes and strings as non-commutative solitons
The non-commutative geometry of a large auxiliary B-field simplifies the construction of D-branes as solitons in open string field theory. Similarly, fundamental strings are constructed as localizedExpand
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INTEGRABLE SYSTEMS AND SUPERSYMMETRIC GAUGE THEORY
Abstract After the work of Seiberg and Witten, it has been seen that the dynamics of N = 2 Yang-Mills theory is governed by a Riemann surface ϵ In particular, the integral of a special differentialExpand
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Heterotic string theory (I). The free heterotic string
A new theory of closed orientable superstrings is constructed as a chiral combination of the closed D = 26 bosonic and D = 10 fermionic strings. The resulting ten-dimensional theory is N = 1Expand
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