6 papers
From the WZWN Model to the Liouville Equation: Exact String Dynamics in Conformally Invariant AdS Background
A. L. Larsen, N. Sánchez
It has been known for some time that the SL(2,R) WZWN model reduces to Liouville theory. Here we give a direct and physical derivation of this result based on the classical string…
Sinh-Gordon, Cosh-Gordon and Liouville Equations for Strings and Multi-Strings in Constant Curvature Spacetimes
A. L. Larsen, N. Sanchez
We find that the fundamental quadratic form of classical string propagation in dimensional constant curvature spacetimes solves the Sinh-Gordon equation, the Cosh-Gordon equa…
New Classes of Exact Multi-String Solutions in Curved Spacetimes
A. L. Larsen, N. Sanchez
We find new classes of {\it exact} string solutions in a variety of curved backgrounds. They include stationary and dynamical (open, closed, straight, finitely and infinitely long)…
Semi-Classical Quantization of Circular Strings in De Sitter and Anti De Sitter Spacetimes
H. J. de Vega, A. L. Larsen, N. Sanchez
We compute the {\it exact} equation of state of circular strings in the (2+1) dimensional de Sitter (dS) and anti de Sitter (AdS) spacetimes, and analyze its properties for the dif…
Strings Propagating in the 2+1 Dimensional Black Hole Anti de Sitter Spacetime
A. L. Larsen, N. Sanchez
We study the string propagation in the 2+1 black hole anti de Sitter background (2+1 BH-ADS). We find the first and second order fluctuations around the string center of mass and o…
Stable and Unstable Circular Strings in Inflationary Universes
A. L. Larsen
It was shown by Garriga and Vilenkin that the circular shape of nucleated cosmic strings, of zero loop-energy in de Sitter space, is stable in the sense that the ratio of the mean…