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arXiv · 0712.0743

Effect of curvature squared corrections in AdS on the viscosity of the dual gauge theory

Yevgeny Kats·Pavel Petrov
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Abstract

We use the real-time finite-temperature AdS/CFT correspondence to compute the effect of general R^2 corrections to the gravitational action in AdS space on the shear viscosity of the dual gauge theory. The R^2 terms in AdS_5 are determined by the central charges of the CFT. We present an example of a four-dimensional gauge theory in which the conjectured lower bound of 1/(4π) on the viscosity-to-entropy ratio is violated for finite N.

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Yevgeny Kats, Pavel Petrov. 2009-01-20. Effect of curvature squared corrections in AdS on the viscosity of the dual gauge theory. https://doi.org/10.1088/1126-6708%2F2009%2F01%2F044

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