2003/08/31 by Michael Gutperle, Per Kraus
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-th
paper · pdf · doi:10.1103/physrevd.69.066005
published as Phys.Rev. D69 (2004) 066005 · 19 pages. v2: references added, comments on vanishing disk amplitudes
arxiv created 2003/09/15 · openalex publication_date 2004/03/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Recent work has shown that unstable D-branes in two-dimensional string theory are represented by eigenvalues in a dual matrix model. We elaborate on this proposal by showing how to systematically include higher order effects in string perturbation theory. The full closed string state produced by a rolling open string tachyon corresponds to a sum of string amplitudes with any number of boundaries and closed string vertex operators. These contributions are easily extracted from the matrix model. As in the AdS-CFT correspondence, the sum of planar diagrams in the open string theory is directly related to the classical theory in the bulk; i.e., sphere diagrams. We also comment on the description of static D-branes in the matrix model, in terms of a solution representing a deformed Fermi sea.