Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


Particles and Nuclei

J. Korean Phy. Soc. 2008; 52(6): 1734-1739

Published online June 14, 2008

Copyright © The Korean Physical Society.

A New Phase at a Finite Quark Density from AdS/CFT

Shin Nakamura, K. P. Yogendran, Yunseok Seo and Sang-Jin Sin


We explore the phases of the ${cal N}=2$ super Yang-Mills theory at a finite quark density by introducing a quark chemical potential in a D3-D7 setup. We formulate the thermodynamics of brane embeddings and we find that the density versus chemical potential equation of state has a rich structure. This yields {em two} distinct first-order phase transitions in a small window of the quark density. In other words, there is a new first-order phase transition in the region of deconfined quarks. In this new phase, the chemical potential is a decreasing function of the density. We suggest that this might be relevant to the difference in the sQGP-wQGP phases of QCD.

Keywords: Finite temperature, Finite density, AdS/CFT, Holographic QCD