Black holes and universality classes of critical points.
We argue that there exists an infinite class of conformal field theories in diverse dimensions having a universal ratio of the central charge c to the normalized entropy density c. The universality class includes all conformal theories which possess a classical gravity dual according to the AdS/CFT correspondence. From the practical point of view, the universality of c/c provides an explicit test which can be applied to determine whether a given critical point may admit a dual description in terms of classical gravity.
Kovtun
Pavel
P
Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, V8P 5C2 Canada. pkovtun@uvic.ca
Ritz
Adam
A