2002/03/15 by Ashok Das, Jnanadeva Maharana, J. Maharana +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #hep-th
paper · pdf · doi:10.1103/physrevd.65.126001
published as Phys.Rev.D65:126001,2002 · 20 pages, to be published in Physical Review D
arxiv created 2002/03/15 · openalex publication_date 2002/05/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The monodromy matrix M^ is constructed for the two dimensional tree level string effective action. The pole structure of M^ is derived using its factorizability property. It is found that the monodromy matrix transforms nontrivially under the noncompact T-duality group, which leaves the effective action invariant, and this can be used to construct the monodromy matrix for more complicated backgrounds starting from simpler ones. We construct, explicitly, M^ for the exactly solvable Nappi-Witten model, both when B=0 and B\ensuremath≠0, where these ideas can be directly checked. We consider well known charged black hole solutions in the heterotic string theory that can be generated by T-duality transformations from a spherically symmetric ``seed'' Schwarzschild solution. We construct the monodromy matrix for the Schwarzschild black hole background of the heterotic string theory.