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11 papers · 2 filters
Topological Landau-Ginzburg Model of Two-Dimensional String Theory
Debashis Ghoshal, Sunil Mukhi
We study a topological Landau-Ginzburg model with superpotential W(X)=X^{-1}. This is argued to be equivalent to c=1 string theory compactified at the self-dual radius. We compute…
Correlation Functions and Multicritical Flows in String Theory
Suresh Govindarajan, T. Jayaraman, Varghese John
We compute all string tree level correlation functions of vertex operators in string theory. This is done by using the ring structure of the theory. In order to study the mul…
coherent states and path-integral derivation of bosonization of non-relativistic fermions in one dimension
Avinash Dhar, Gautam Mandal, Spenta R. Wadia
We complete the proof of bosonization of noninteracting nonrelativistic fermions in one space dimension by deriving the bosonized action using coherent states in the fer…
A Note on Gauge Transformations in Batalin-Vilkovisky Theory
Ashoke Sen, Barton Zwiebach
We give a generally covariant description, in the sense of symplectic geometry, of gauge transformations in Batalin-Vilkovisky quantization. Gauge transformations exist not only at…
Perturbation of the Ground Varieties of C = 1 String Theory
Debashis Ghoshal, Porus Lakdawala, Sunil Mukhi
We discuss the effect of perturbations on the ground rings of string theory at the various compactification radii defining the points of the moduli space. We argue that…
Two-Dimensional Black Hole and Nonperturbative String Theory
Avinash Dhar
We discuss the interpertation of the matrix model as two-dimensional string theory in a dilaton-black hole background. The nonperturbative formulation of matrix model i…
A Proof of Local Background Independence of Classical Closed String Field Theory
Ashoke Sen, Barton Zwiebach
We give a complete proof of local background independence of the classical master action for closed strings by constructing explicitly, for any two nearby conformal theories in a C…
Duality Symmetries of 4D Heterotic Strings
John H. Schwarz, Ashoke Sen
Target space duality (T duality), which interchanges Kaluza--Klein and winding-mode excitations of the compactified heterotic string, is realized as a symmetry of a world-sheet act…
Wave Propagation in Stringy Black Hole
Avinash Dhar, Gautam Mandal, Spenta R. Wadia
We further study the nonperturbative formulation of two-dimensional black holes. We find a nonlinear differential equation satisfied by the tachyon in the black hole background. We…
SL(2, Z) Duality and Magnetically Charged Strings
Ashoke Sen
Postulate of SL(2,\Z) invariance of toroidally compactified heterotic string theory in four dimensions implies the existence of new string (dual string) states carrying both, elect…
Two dimensional black-hole as a topological coset model of c=1 string theory
S. Mukhi, C. Vafa, E. Frenkel
We show that a special superconformal coset (with ) is equivalent to matter coupled to two dimensional gravity. This identification allows a direct computation of…