Gravity Back-reaction to the Baryon Density for Bulk Filling Branes (original) (raw)
2007
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 hole where the effect of charge on the metric is proportional to Nf/Nc. As a consequence, phase diagram changes qualitatively if we allow Nf/Nc finite: it closes at the finite density unlike the probe brane embedding approach. Another issue we discuss here is the question whether there is any chemical potential dependence in the confining phase. We consider this problem in the hard wall model with baryon charge. We conclude that there is a non-trivial dependence on the chemical potential in this case also.
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Bulk Filling Branes and the Baryon Density in AdS/QCD with gravity back-reaction
2007
Abstract: We consider the gravity back reaction on the metric due to the baryon density in effective ads/qcd model 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 hole where the effect of charge on the metric is proportional to Nf/Nc. As a consequence, phase diagram changes qualitatively if we allow Nf/Nc finite: it closes at the finite density unlike the probe brane embedding approach. Another issue we discuss here is the question whether there is any chemical potential dependence in the confining phase. We consider this problem in the hard wall model with baryon charge. We conclude that there is a non-trivial dependence on the chemical potential in this case also.
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Journal of High Energy Physics, 2002
We provide a detailed map between wrapped D3-branes in Anti-de Sitter (AdS) backgrounds and dibaryon operators in the corresponding conformal field theory (CFT). The effective five dimensional action governing the dynamics of AdS space contains a U(1)R gauge field that mediates interactions between objects possessing R-charge. We show that the U(1)R charge of these wrapped D3-branes as measured by the
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