Two-dimensional quantum cosmology.

Details Two-dimensional quantum cosmology. Two-dimensional quantum cosmology.

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nuphb.363..132c&link_type=abstract

Nuclear Physics B, Part. Phys., Vol. 363, No. 1, p. 132 - 162

Physics

Nuclear Physics

45

Scientific paper

Two-dimensional quantum gravity coupled to conformally invariant matter with central charge c > 25 has been proposed as a toy model for quantum gravity in higher dimensions. The associated 'Wheeler-DeWitt equation' is non-linear and unstable to forming a condensate of baby universes. This will occur even in the classical c→∞ limit. Small fluctuations about this background describe the propagation of single universes and satisfy a more conventional linear Wheeler-DeWitt equation. The resulting two-dimensional cosmology depends on details of the non-linear dynamics. In particular the existence of a large-scale cosmological constant is determined by the behavior of a string theoretic tachyon potential near its minimum.

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