Four Dimensional Gravitational Backgrounds Based on N=4 c=4 Superconformal Systems

Abstract

We propose two new realizations of the N=4, $\hat{c}=4$ superconformal system based on the compact and non-compact versions of parafermionic algebras. The target space interpretation of these systems is given in terms of four-dimensional target spaces with non-trivial metric and topology different from the previously known four-dimensional semi-wormhole realization. The proposed $\hat{c}=4$ systems can be used as a building block to construct perturbatively stable superstring solutions with covariantized target space supersymmetry around non-trivial gravitational and dilaton backgrounds.

LateX, 21pp

References in corpus (15)

• Pre-Big-Bang in String Cosmology
• Elements of String Cosmology
• $O(d,d)$-Covariant String Cosmology
• A Closed, Expanding Universe in String Theory
• Exact Duality Symmetries in CFT and String Theory
• Beyond the Large N Limit: Non-linear W(infinity) as symmetry of the SL(2,R)/U(1) coset model
• Strings on Curved Spacetimes: Black Holes, Torsion, and Duality
• Cosmological String Backgrounds from Gauged WZW Models
• Dilaton, winding modes and cosmological solutions
• Cosmological solutions with dilaton and maximally symmetric space in string theory
• Some Exact Solutions of String Theory in Four and Five Dimensions
• Global Analysis of New Gravitational Singularities in String and Particle Theories
• Gravitational Instantons in Heterotic String Theory: The H-Map and the Moduli Deformations of (4,4) Superconformal Field Theories
• The Tachyon in a Linear Expanding Universe
• Target Space Description of W-Infinity Symmetry in Coset Models

Cited by in corpus (34)

• String Theory and the Path to Unification: A Review of Recent Developments
• Infrared Regularization of Superstring Theory and the One-Loop Calculation of Coupling Constants
• Superstrings on NS5 backgrounds, deformed AdS3 and holography
• O(2,2) Transformations and the String Geroch Group
• Universality properties of N=2 and N=1 Heterotic threshold corrections
• Dynamical Topology Change in String Theory
• Superstring Gravitational Wave Backgrounds with Spacetime Supersymmetry
• T-duality and world-sheet supersymmetry
• Heterotic/Type II Triality and Instantons on $K_3$
• The partition function of the supersymmetric two-dimensional black hole and little string theory
• Non-perturbative Temperature Instabilities in N=4 Strings
• D-branes and extended characters in SL(2,R)/U(1)
• Non--Abelian Duality, Parafermions and Supersymmetry
• Exact Supersymmetric String Solutions in Curved Gravitational Backgrounds
• Poisson-Lie T-Duality and Supersymmetry
• Infrared behavior of Closed Superstrings in Strong Magnetic and Gravitational Fields
• Universal moduli-dependent thresholds in Z(2)xZ(2) orbifolds
• Curved Four-Dimensional Spacetime as Infrared Regulator in Superstring Theories
• T-Duality and Non-Local Supersymmetries
• Solitons of axion-dilaton gravity
• T-Duality in Arbitrary String Backgrounds
• A Wave-function for Stringy Universes
• Duality and Restoration of Manifest Supersymmetry
• On integrable models from pp-wave string backgrounds
• Dynamical Topology Change, Compactification and Waves in String Cosmology
• Supersymmetry and Dualities
• NS5-branes on an ellipsis and novel marginal deformations with parafermions
• One Loop Corrections to Coupling Constants in IR-regulated String Theory
• Threshold corrections in orbifold models and superstring unification of gauge interactions
• Five-Brane Configurations without a Strong Coupling Regime
• Holographic approach to deformations of NS5-brane distributions and exact CFTs
• On the Relation of Four-Dimensional N=2,4 -- Supersymmetric String Backgrounds to Integrable Models
• Symmetries of Four-dimensional String Effective Action with Cosmological Constant
• Systematics of string loop threshold corrections in orbifold models