On touching random surfaces, two-dimensional quantum gravity and non-critical string theory

Abstract

A set of physical operators which are responsible for touching interactions in the framework of c<1 unitary conformal matter coupled to 2D quantum gravity is found. As a special case the non-critical bosonic strings are considered. Some analogies with four dimensional quantum gravity are also discussed, e.g. creation-annihilation operators for baby universes, Coleman mechanism for the cosmological constant.

22 pages, Latex2e, 3 figures

References in corpus (3)

• D-branes and Matrix Theory in Curved Space
• A scenario for the c>1 barrier in non-critical bosonic strings
• Two-dimensional Quantum Gravity

Cited by in corpus (2)

• Multiple-Trace Operators and Non-Local String Theories
• Brief comments on Jackiw-Teitelboim gravity coupled to Liouville theory