Duality of Lorentzian and Euclidean black holes in two-dimensional string-generated models

TL;DR

This paper explores the properties and duality symmetries of Lorentzian and Euclidean black hole solutions in two-dimensional string-inspired dilaton-gravity models, highlighting their interconnected nature.

Contribution

It introduces a generalized 2D dilaton-gravity framework with a modulus field from heterotic string compactification and analyzes the duality symmetries of black hole solutions.

Findings

Identification of duality relations between Lorentzian and Euclidean black holes

Characterization of black hole properties within the generalized model

Insights into string theory compactification effects on black hole solutions

Abstract

We discuss the properties of lorentzian and euclidean black hole solutions of a generalized 2-dim dilaton-gravity action containing a modulus field, which arises from the compactification of heterotic string models. The duality symmetries of these solutions are also investigated.