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Strings from tachyons: The c = 1 matrix reloaded
 JHEP
"... We propose a new interpretation of the c=1 matrix model as the worldline theory of N unstable Dparticles, in which the hermitian matrix is provided by the nonabelian open string tachyon. For Dparticles in 1+1d string theory, we find a direct quantitative match between the closed string emission ..."
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Cited by 130 (1 self)
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We propose a new interpretation of the c=1 matrix model as the worldline theory of N unstable Dparticles, in which the hermitian matrix is provided by the nonabelian open string tachyon. For Dparticles in 1+1d string theory, we find a direct quantitative match between the closed string emission due to a rolling tachyon and that due to a rolling eigenvalue in the matrix model. We explain the origin of the doublescaling limit, and interpret it as an extreme representative of a large equivalence class of dual theories. Finally, we define a concrete decoupling limit of unstable Dparticles in IIB string theory that reduces to the c=1 matrix model, suggesting that The duality between open and closed string theory has led to various deep and surprising insights into the fundamental structure of both systems. A relatively recent, but still incompletely understood, example of such a duality is Sen’s observation that unstable Dbranes can completely decay into closed strings via open string tachyon condensation [1]. Both the full time
The annular report on noncritical string theory
, 2003
"... Recent results on the annulus partition function in Liouville field theory are applied to noncritical string theory, both below and above the critical dimension. Liouville gravity coupled to c ≤ 1 matter has a dual formulation as a matrix model. Two wellknown matrix model results are reproduced pr ..."
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Cited by 121 (5 self)
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Recent results on the annulus partition function in Liouville field theory are applied to noncritical string theory, both below and above the critical dimension. Liouville gravity coupled to c ≤ 1 matter has a dual formulation as a matrix model. Two wellknown matrix model results are reproduced precisely using the worldsheet formulation: (1) the correlation function of two macroscopic loops, and (2) the leading nonperturbative effects. The latter identifies the eigenvalue instanton amplitudes of the matrix approach with disk instantons of the worldsheet approach, thus demonstrating that the matrix model is the effective dynamics of a Dbrane realization of d ≤ 1 noncritical string theory. In the context of string theory above the critical dimension, i.e. d ≥ 25, Liouville field theory realizes twodimensional de Sitter gravity on the worldsheet. In this case, appropriate Dbrane boundary conditions on the annulus realize the Smatrix for twodimensional de Sitter gravity.
Near Hagedorn Dynamics of NS Fivebranes or A New Universality Class of Coiled Strings
, 2008
"... We analyze the thermodynamics of NS 5branes as the temperature approaches the NS 5branes’ Hagedorn temperature, and conclude that the dynamics of “Little String Theory” is a new universality class of interacting strings. First we point out how to vary the temperature of the near extremal solution ..."
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Cited by 24 (0 self)
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We analyze the thermodynamics of NS 5branes as the temperature approaches the NS 5branes’ Hagedorn temperature, and conclude that the dynamics of “Little String Theory” is a new universality class of interacting strings. First we point out how to vary the temperature of the near extremal solution by taking into account gs corrections. The Hagedorn temperature is shown to be a limiting temperature for the theory. We then compare the thermodynamics to that
The Annular Report on NonCritical String Theory
, 2003
"... Recent results on the annulus partition function in Liouville field theory are applied to noncritical string theory, both below and above the critical dimension. Liouville gravity coupled to c ≤ 1 matter has a dual formulation as a matrix model. Two wellknown matrix model results are reproduced pr ..."
Abstract
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Recent results on the annulus partition function in Liouville field theory are applied to noncritical string theory, both below and above the critical dimension. Liouville gravity coupled to c ≤ 1 matter has a dual formulation as a matrix model. Two wellknown matrix model results are reproduced precisely using the worldsheet formulation: (1) the correlation function of two macroscopic loops, and (2) the leading nonperturbative effects. The latter identifies the eigenvalue instanton amplitudes of the matrix approach with disk instantons of the worldsheet approach, thus demonstrating that the matrix model is the effective dynamics of a Dbrane realization of d ≤ 1 noncritical string theory. In the context of string theory above the critical dimension, i.e. d ≥ 25, Liouville field theory realizes twodimensional de Sitter gravity on the worldsheet. In this case, appropriate Dbrane boundary conditions on the annulus realize the Smatrix for twodimensional de Sitter gravity.