Comments on D-Instantons in c<1 Strings

Details Comments on D-Instantons in c<1 Strings Comments on D-Instantons in c<1 Strings

1999-02-23

arxiv.org/abs/hep-th/9902169v4

Phys.Lett. B460 (1999) 71-78

Physics

High Energy Physics

High Energy Physics - Theory

12 pages with 1 figure, LaTex, Version to appear in PLB

Scientific paper

10.1016/S0370-2693(99)00744-3

We suggest that the boundary cosmological constant \zeta in c<1 unitary string theory be regarded as the one-dimensional complex coordinate of the target space on which the boundaries of world-sheets can live. From this viewpoint we explicitly construct analogues of D-instantons which satisfy Polchinski's ``combinatorics of boundaries.'' We further show that our operator formalism developed in the preceding articles is powerful in evaluating D-instanton effects, and also demonstrate for simple cases that these effects exactly coincide with the stringy nonperturbative effects found in the exact solutions of string equations.

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