We use gauge/string duality to investigate the free energy of two static color sources (a heavy quark-antiquark pair) in a Yang-Mills theory in strongly interacting matter, varying temperature and chemical potential. The dual space geometry is Anti-de Sitter with a charged black-hole to describe finite temperature and density in the boundary theory, and we also include a background dilaton field to generate confinement. The resulting phase diagram in the chemical potential-temperature μ−T plane is in a quite good agreement with lattice results and effective models of QCD.
@article{arxiv.1008.3116,
title = {Holography, Heavy-Quark Free Energy, and the QCD Phase Diagram},
author = {Pietro Colangelo and Floriana Giannuzzi and Stefano Nicotri},
journal= {arXiv preprint arXiv:1008.3116},
year = {2011}
}