Deconstructing the Little Hagedorn Holography

TL;DR

This paper investigates the thermodynamics of Little String Theory, revealing how bulk radiation effects modify the Hagedorn behavior and proposing a revised holographic picture involving a finite superheated state band and a phase transition.

Contribution

It introduces modifications to the holographic Little Hagedorn model based on geometrical analysis and deconstruction, accounting for radiation effects and UV completion.

Findings

Bulk radiation screens Hagedorn behavior in Little String Theory.

A stable density of states is described by a seven-dimensional nonrelativistic gas.

A first-order phase transition occurs from superheated states to plasma phase.

Abstract

We study aspects of the thermodynamics of Little String Theory, using its geometrical definition in critical ten-dimensional string theory. We find that bulk radiation effects tend to screen the Hagedorn behaviour of the theory, in contrast to the behaviour in the AdS system background. The resulting density of states of the system, when stable, is described by a seven-dimensional nonrelativistic gas. This requires modifications of the holographic Little Hagedorn picture. Using deconstructions we suggest such modifications. The model is embedded into a system which has an ultraviolet fixed point with an AdS description. We investigate the thermodynamical properties of these UV completed models. It is found that the Hagedorn regime survives in a finite band of superheated states that eventually decay into the plasma phase of the conformal field theory that serves as UV regulator. This is manifested in a first-order phase transition that is driven by radiative corrections.