Quark number Susceptibility and Phase Transition in hQCD Models
  We study the quark number susceptibility, an indicator of QCD phase transition, in the hard wall and soft wall models of hQCD. We find that the susceptibilities in both models are the same, jumping up at the deconfinement phase transition temperature. We also find that the diffusion constant in the soft wall model is enhanced compared to the one in the hard wall model. 
Kwanghyun Jo, Youngman Kim, Hyun Kyu Lee, and Sang-Jin Sin