A New Deconstruction of Little String Theory

TL;DR

This paper proposes a novel approach to deconstruct Little String Theory using a four-dimensional conformal field theory, employing the AdS/CFT correspondence to analyze the continuum limit and its implications for string theory duals.

Contribution

It introduces a new deconstruction method for Little String Theory via a 4D conformal field theory and explores its large-N limit using AdS/CFT, providing a tractable string dual.

Findings

The continuum limit yields Little String Theory compactified to four dimensions.

The approach produces a large-N confining gauge theory with a string dual.

Decoupled massive and massless states are identified in the limit.

Abstract

We present evidence for a new deconstruction of Little String Theory (LST). The starting point is a four-dimensional conformal field theory on its Higgs branch which provides a lattice regularization of six-dimensional gauge theory. We argue that the corresponding continuum limit is a 't Hooft large-N limit of the same four-dimensional theory on an S-dual confining branch. The AdS/CFT correspondence is then used to study this limit in a controlled way. We find that the limit yields LST compactified to four dimensions on a torus of fixed size. The limiting theory also contains other massive and massless states which are completely decoupled. The proposal can be adapted to deconstruct Double-Scaled Little String Theory and provides the first example of a large-N confining gauge theory in four dimensions with a fully tractable string theory dual.