# Holographic complexity of charged Taub-NUT-AdS black holes

## TL;DR

This paper explores how holographic complexity behaves in charged Taub-NUT-AdS black holes, revealing the influence of Misner strings and the effects of electromagnetic duality on late-time complexity growth.

## Contribution

It introduces the role of Misner strings in holographic complexity and examines how adding a Maxwell boundary term restores electromagnetic duality.

## Key findings

- Misner potential and charge affect late-time complexity growth.
- Adding Maxwell boundary term restores electromagnetic duality.
- Complexity growth behavior resembles that of RN-AdS black holes.

## Abstract

In this paper, we investigate the holographic complexity in the charged Taub-NUT-AdS black holes with Misner strings present in the Einstein-Maxwell gravity. We show that differing from the normal black holes, where the late-time complexity growth rate is only determined by the quantities at outer and inner ``Reissner-Nordstrom''-type (RN-type) horizons, here the quantities (the Misner potential and Misner charge) related to the Misner strings also play an important role in CA complexity. Similar to the case of the normal electromagnetic black hole, the late-time rate for the original CA conjecture is independent on the magnetic charges. However, disparate with common results of the dyonic solutions, the electric charge appeared here is the total charge of this black hole. Besides, we found that the result in this original CA conjecture also violates the electromagnetic duality. And this duality can be restored by adding the Maxwell boundary term with the proportional constant $\g=1/2$. In this case, the late-time rate is sensitive to the magnetic charge. Moreover, we also found that the additional term only changes the proportion between the electric and magnetic charges, and it does not affect the Misner term appeared in the late-time rate. Finally, we studied the time-dependence of the complexity growth rate and found that they share similar behaviors with that in RN-AdS black holes.