Some Comments On String Dynamics

TL;DR

This paper discusses string dynamics in specific theoretical contexts, exploring self-dual strings, conformal field theory singularities, and implications for real-world physics and the cosmological constant problem.

Contribution

It provides insights into string behavior at special moduli points, examines associated quantum effects, and considers potential relevance to cosmology.

Findings

Identification of self-dual non-critical strings in Type IIB theory.

Analysis of conformal field theory singularities and quantum effects.

Discussion of string dynamics' relevance to cosmological constant issues.

Abstract

Three subjects are considered here: a self-dual non-critical string that appears in Type IIB superstring theory at points in ${\rm K3}$ moduli space where the Type IIA theory has extended gauge symmetry; a conformal field theory singularity at such points which may signal quantum effects that persist even at weak coupling; and the rich dynamics of the real world under compactification, which may be relevant to some attempts to explain the vanishing of the cosmological constant.