42 research outputs found
A note on the Zakharov-Shabat topological model
In this note I discuss some features of the topological theory obtained from
the Zakharov-Shabat (or general sl(2,C)) hierarchy, and comment on some
possible physical and/or mathematical interpretations of it.Comment: 9 page
String Theory and the CPT Theorem on the World-Sheet
We study the CPT theorem for a two-dimensional conformal field theory on an
arbitrary Riemann surface. On the sphere the theorem follows from the
assumption that the correlation functions have standard hermiticity properties
and are invariant under the transformation . The theorem can
then be extended to higher genus surfaces by sewing. We show that, as a
consequence of the CPT theorem on the world-sheet, the scattering -matrix in
string theory is {\sl formally\/} hermitean at any loop order.Comment: TeX macros include
Thermodynamics of Two-Dimensional Black-Holes
We explore the thermodynamics of a general class of two dimensional dilatonic
black-holes. A simple prescription is given that allows us to compute the mass,
entropy and thermodynamic potentials, with results in agreement with those
obtained by other methods, when available.Comment: 12 page
Bosonization of World-Sheet Fermions in Minkowski Space-Time
We propose a way of bosonizing free world-sheet fermions for -dimensional
heterotic string theory formulated in Minkowski space-time. We discuss the
differences as compared to the standard bosonization performed in Euclidean
space-time.Comment: 1+9 pages, TeX macros include