Tadashi Takayanagi JHEP12(2004)071 doi:10.1088/1126-6708/2004/12/071
Matrix model and time-like linear dilaton matter
Tadashi Takayanagi1
Show affiliationsWe consider a matrix model description of the 2d string theory whose matter part is given by a time-like linear dilaton CFT. This is equivalent to the c = 1 matrix model with a deformed, but very simple Fermi surface. Indeed, after a Lorentz transformation, the corresponding 2d spacetime is a conventional linear dilaton background with a time-dependent tachyon field. We show that the tree level scattering amplitudes in the matrix model perfectly agree with those computed in the world-sheet theory. The classical trajectories of fermions correspond to the decaying D-branes in the time-like linear dilaton CFT. We also discuss the ground ring structure. Furthermore, we study the properties of the time-like Liouville theory by applying this matrix model description. We find that its ground ring structure is very similar to that of the minimal string.
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E-print Number: hep-th/0411019
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- PACS
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11.25.Hf Conformal field theory, algebraic structures
14.80.-j Other particles (including hypothetical)
11.27.+d Extended classical solutions; cosmic strings, domain walls, texture
- Subjects
- Dates
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Issue 12 (December 2004)
Received 18 November 2004, accepted for publication 30 December 2004
Published 20 January 2005
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Matrix model and time-like linear dilaton matter
Tadashi Takayanagi JHEP12(2004)071
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