A two-dimensional string cosmology

A bstract We study two-dimensional string theory on a time-dependent background, whose worldsheet description consists of Liouville at central charge c = 1 and 25, together with the conformal ghosts. compute tree-level three-point four-point components cosmological wavefunction in perturbation theory. The latter is evaluated numerically by decomposing correlation functions into Virasoro blocks function coefficients integrating over moduli space four-punctured sphere diagram. This computation confirms surprisingly simple conjectural result for component physical interpretation remains to be clarified.