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

نویسندگان

  • Yevgeny Kats
  • Pavel Petrov
چکیده

We use the real-time finite-temperature AdS/CFT correspondence to compute the effect of general R corrections to the gravitational action in AdS space on the shear viscosity of the dual gauge theory. The R terms in AdS5 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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تاریخ انتشار 2009