Target Space Interpretation of New Moduli in 2D String Theory

TL;DR

This paper investigates new states in 2D string theory, showing how certain deformations lead to equivalent solutions and exploring the role of ghost number states in generating transformations between these solutions.

Contribution

It provides a novel interpretation of recently discovered states in 2D string theory through the lens of target space and ghost number analysis.

Findings

Deformations by ghost number two states produce equivalent classical solutions.

Ghost number one states generate transformations relating these solutions.

Higher ghost number states may have additional interpretative roles.

Abstract

We analyze the new states that have recently been discovered in 2D string theory by E. Witten and B. Zwiebach. Since the Liouville direction is uncompactified, we show that the deformations by the new ghost number two states generate equivalent classical solutions of the string fields. We argue that the new ghost number one states are responsible for generating transformations which relate such equivalent solutions. We also discuss the possible interpretation of higher ghost number states of those kinds.