Matrix Models and 2D String Theory

Emil J. Martinec

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classification ✦ hep-th

keywords stringtheoryaspectsbasiccalculationsclosedcondensationdevelopment

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String theory in two-dimensional spacetime illuminates two main threads of recent development in string theory: (1) Open/closed string duality, and (2) Tachyon condensation. In two dimensions, many aspects of these phenomena can be explored in a setting where exact calculations can be performed. These lectures review the basic aspects of this system.

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$c=1$ strings as a matrix integral
hep-th 2026-04 unverdicted novelty 8.0

The c=1 string perturbative S-matrix equals a double-scaled (0+0)-dimensional matrix integral on the spectral curve x(z)=2√2 cos(z), y(z)=sin(z), establishing triality with worldsheet and matrix quantum mechanics desc...