English

Rotating $(2+1)$-dimensional Black Holes in Einstein-Maxwell-Dilaton Theory

General Relativity and Quantum Cosmology 2023-02-02 v2

Abstract

We consider Einstein-Maxwell-Dilaton theory in (2+1)(2+1)-dimensions where the coupling between the scalar field and the Maxwell invariant is the dilatonic coupling f(ϕ)=exp(2αϕ)f(\phi) = \exp (-2\alpha \phi) and obtain novel exact rotating black hole solutions. The dilatonic parameter α\alpha impacts the metric function, affecting the rotating properties of the black hole, its mass and also its thermodynamics. Calculating the entropy we find that it is always positive and the dilatonic black holes may have higher entropy than the BTZ black hole. Depending on the parameters, the dilatonic BTZ-like black hole may be thermodynamically preferred than the BTZ black hole which is recovered when α=0\alpha=0.

Keywords

Cite

@article{arxiv.2210.15704,
  title  = {Rotating $(2+1)$-dimensional Black Holes in Einstein-Maxwell-Dilaton Theory},
  author = {Thanasis Karakasis and Eleftherios Papantonopoulos and Zi-Yu Tang and Bin Wang},
  journal= {arXiv preprint arXiv:2210.15704},
  year   = {2023}
}

Comments

Accepted for publication in PRD

R2 v1 2026-06-28T04:40:21.419Z