# Conditions for vacuum instability in holographic theories with dilaton field

## TL;DR

This paper explores how dilaton fields influence vacuum stability in holographic models, revealing that probe brane position and temperature significantly affect the potential barrier and pair production rates.

## Contribution

It demonstrates the dependence of vacuum instability on probe brane position, dilaton scale parameter, and temperature within a holographic framework.

## Key findings

- Dilaton affects vacuum stability depending on probe brane position.
- Temperature enhances the dilaton's effect in reducing the potential barrier.
- Pair production rate remains low despite Schwinger-like effects.

## Abstract

We investigate the vacuum instability in the presence of dilaton field in a holographic set up. Although the dilaton is a bulk field, it leads to the vacuum instability on the boundary. We show that the whole process crucially depends on the probe brane position and as well on the radial coordinate. So that the effects of dilaton scale parameter in different regions of the bulk or for different probe brane positions are different. We also observe that in our study the temperature can strengthen the effect of scale parameter in reducing the potential barrier. Finally, we show that this Schwinger-like effect, although is interesting by itself, does not produce a considerable pair production rate.