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Dirichlet String Theory and Singular Random Surfaces
Miao Li
We show that string theory with Dirichlet boundaries is equivalent to string theory containing surfaces with certain singular points. Surface curvature is singular at these points.…
Dirichlet Strings
Miao Li
Strings propagating along surfaces with Dirichlet boundaries are studied in this paper. Such strings were originally proposed as a possible candidate for the QCD string. Our approa…
Matter-ghost mixing and the exact 2d black hole metric
Miao Li
We study a revised version of Witten's 2d black hole, in which the matter and (b,c) ghosts are mixed. The level of the coset model is still 9/4. We show that this model is equivale…
A proposal on the topological sector of 2d string
Miao Li
The field content of the two dimensional string theory consists of the dynamical tachyon field and some nonpropagating fields which consist in the topological sector of this theory…