Non-commutative holographic QCD and DC conductivity
  In this paper we consider non-commutative Sakai-Sugimoto model by using D8-branes probing the background generated by D4-branes with an NSNS B-field turned on. We study response of the system to external electric field which could be parallel to orthogonal to the background B-field. We compute the conductivity as a function of temperature and non-commutativity parameters. Non-commutativity effect, depending on the relative orientation of external and background electromagnetic fields, may increase or decrease the conductivity. 
Mohammad Ali-Akbari
hep-th