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arXiv · hep-th/0112150

CFT/CFT interpolating RG flows and the holographic c-function

Dario Martelli·Andre Miemiec
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Abstract

We consider holographic RG flows which interpolate between non-trivial ultra-violet (UV) and infra-red (IR) conformal fixed points. We study the ``superpotentials'' which characterize different flows and discuss their expansions near the fixed points. Then we focus on the holographic $c$-function as defined from the two-point function of the stress-energy tensor. We point out that the equation for the metric fluctuations in the background flow is equivalent to a scattering problem and we use this to obtain an expression for the $c$-function in terms of the associated Jost functions. We propose two explicit models that realize UV-IR flows. In the first example we consider a thin wall separating two AdS spaces with different radii, while in the second one the UV region is replaced with an asymptotically AdS space. We find that the holographic $c$-function obeys the expected properties. In particular it reduces to the correct -- nonzero -- central charge in the IR limit.

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Dario Martelli, Andre Miemiec. 2002-03-06. CFT/CFT interpolating RG flows and the holographic c-function. https://doi.org/10.1088/1126-6708%2F2002%2F04%2F027

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