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In the context of the AdS/CFT correspondence we discuss the gravity dual of a heavy-ion-like collision in a variant of N = 4 SYM. We provide a gravity dual picture of entire process. We estimate the initial entropy and temperature as a function of the initial saturation momentum Qs. We suggest that the cooling of the fireball is the dual of a brane… (More)

We consider a holographic dual of hydrodynamics of N = 4 SYM plasma that undergoes non-isotropic three-dimensional expansion relevant to RHIC fireball. Our model is a natural extension of the Bjorken’s one-dimensional expansion, and it describes an elliptic flow whose v2 and eccentricity are given in terms of anisotropy parameters. Holographic… (More)

In the context of holographic QCD we analyze Sakai-Sugimoto’s chiral model at finite baryon density and zero temperature. The baryon number density is introduced through compact D4 wrapping S4 at the tip of D8-D8. Each baryon acts as a chiral point-like source distributed uniformly over R3, and leads a non-vanishing U(1)V potential on the brane. For fixed… (More)

We provide a method to study hadronic matter at finite density in the context of the Sakai-Sugimoto model. We introduce the baryon chemical potential through the external U(1)v in the induced (DBI plus CS) action on the D8-probe-brane, where baryons are skyrmions. Vector dominance is manifest at finite density. We derive the baryon density effect on the… (More)

We consider the diffusion of a non-relativistic heavy quark of fixed mass M , in a one-dimensionally expanding and strongly coupled plasma using the AdS/CFT duality. The Green’s function constructed around a static string embedded in a background with a moving horizon, is identified with the noise correlation function in a Langevin approach. The (electric)… (More)

- Sang-Jin Sin
- 2008

We consider the gravity back reaction to the baryon density in ads/qcd by reconsidering the role of the charged AdS black hole. Previously it has been known that the U(1) charge is dual to the R-charge. Here we point out that if we consider the case where AdS5 is completely filled with Nf flavor branes, the gravity back reaction produces charged AdS black… (More)

We calculated the vector susceptibilitiy in holographic QCD models to study QCD chiral/deconfinemnt phase transition. We found that the vector susceptibility obtained in this work agrees with the results from various model calculations and lattice QCD. Just above Tc χV from QCD calculations [12, 17, 18] saturate to the value of the free-quark gas faster… (More)

We consider dilaton back reaction to the AdS gravity system and find an exact solution with two parameters interpolating between the recently discovered Csaki-Reece solution and the wellknown AdS black hole solution. Since solution does not admit the Hawking temperature in generic parameter values, we define the temperature using the holographic… (More)

We explore phases of an N = 2 super Yang-Mills theory at finite quark density by introducing 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 rich structure. This yields two distinct first order phase transitions in a small window of… (More)

We investigate dense matter in the context of Sakai and Sugimoto’s holographic model of QCD at zero temperature but finite baryon density in the Wigner-Seitz approximation. In bulk, baryons are treated as instantons on S3×R1 in each Wigner-Seitz cell. At low density, the energy density varies as n 1/3 B while at high density it varies as n 5/3 B . In… (More)