# The entropy of Taub-Bolt-AdS from an improved action principle

## TL;DR

This paper investigates the thermodynamics of four-dimensional NUT-charged spaces, introducing an improved action principle with topological densities, and computes the entropy of Taub-Bolt-AdS solutions using a Noether charge approach.

## Contribution

It presents a novel improved action principle that simplifies the thermodynamic analysis of NUT-charged spaces and computes their entropy via Noether charges.

## Key findings

- Spaces with NUT charges have consistent thermodynamic relations.
- The entropy of Taub-Bolt-AdS is explicitly calculated.
- The improved action principle clarifies the thermodynamic properties.

## Abstract

In this article the study of four dimensional spaces with NUT charges and their ground states is continued. In particular, through the introduction of an improved action principle containing topological densities, it is shown that these spaces have simple and sound thermodynamic relations. As an example the entropy of Taub-Bolt-AdS solution is computed in terms of a Noether charge.