B. Goutéraux, E. Kiritsis
All possible scaling IR asymptotics in homogeneous holographic phases preserving or breaking a U(1) symmetry in the IR are classified. Scale-invariant geometries where the scalar extremizes its effective potential are distinguished from hyperscaling-violating geometries where the scalar runs logarithmically. Both exact solutions as well as leading behaviors are exhibited. Using them, neutral or charged geometries realizing both fractionalized or cohesive phases are found. The generic global IR picture emerging is that of quantum critical lines, separated by quantum critical points which correspond to the scale invariant solutions with a constant scalar.
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http://arxiv.org/abs/1212.2625
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