Hartle-Hawking Vacuum for c=1 Tachyon Condensation

Abstract

Quantum vacua are constructed for a time-symmetric cosmology describing closed string tachyon condensation in two-dimensional string theory. Due to the Euclidean periodicity of the solution, and despite its time dependence, we are able to construct thermal states at discrete values of the temperature. The asymptotic thermal Green functions and stress energy tensor are computed and found to have an intriguing resemblance to those in the Hartle-Hawking vacuum of a black hole.

14 pages, 1 figure, harvmac

References in corpus (6)

• A Matrix Model Dual of Type 0B String Theory in Two Dimensions
• Rolling Tachyons from Liouville theory
• D-brane Decay in Two-Dimensional String Theory
• Matrix Cosmology
• Closed String Tachyon Condensation at c=1
• Particle Production in Matrix Cosmology

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• Physics of the Inverted Harmonic Oscillator: From the lowest Landau level to event horizons
• Black Hole Non-Formation in the Matrix Model
• Noncritical M-Theory in 2+1 Dimensions as a Nonrelativistic Fermi Liquid
• Spacelike boundaries from the c=1 Matrix Model
• Matrix Model and Time-like Linear Dilaton Matter
• Topological string in harmonic space and correlation functions in $S^3$ stringy cosmology
• Tachyon Backgrounds in 2D String Theory
• Instantons in sine-Liouville theory
• Quantum behaviour near a spacelike boundary in the c=1 matrix model
• On non-homogeneous tachyon condensation in closed string theory