Papers › A holographic model for QCD in the Veneziano limit at finite temperature and density
A holographic model for QCD in the Veneziano limit at finite temperature and density
T. Alho, M. Jarvinen, K. Kajantie, E. Kiritsis, C. Rosen, K. Tuominen
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A holographic model of QCD in the limit of large number of colors, N_c, and massless fermion flavors, N_f, but constant ratio x_f=N_f/N_c is analyzed at finite temperature and chemical potential. The five dimensional gravity model contains three bulk fields: a scalar dilaton sourcing TrF², a scalar tachyon dual to q̅q and a 4-vector dual to the baryon current q̅ γ^μ q. The main result is the μ,T phase diagram of the holographic theory. A first order deconfining transition along Tₕ(μ) and a chiral transition at Tᵪ(μ)>Tₕ(μ) are found. The chiral transition is of second order for all μ. The dependence of thermodynamical quantities including the speed of sound and susceptibilities on the chemical potential and temperature is computed. A new quantum critical regime is found at zero temperature and finite chemical potential. It is controlled by an AdS₂×R³ geometry and displays semi-local criticality.
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