Abstract
We investigate the AdS/CFT interpretation of the class of algebraically special solutions of Einstein gravity with a negative cosmological constant. Such solutions describe a CFT living in a 2 + 1 dimensional time-dependent geometry that, generically, has no isometries. The algebraically special condition implies that the expectation value of the CFT energy-momentum tensor is a local function of the boundary metric. When such a spacetime is slowly varying, the fluid/gravity approximation is valid and one can read off the values of certain higher order transport coefficients. To do this, we introduce a formalism for studying conformal, relativistic fluids in 2 + 1 dimensions that reduces everything to the manipulation of scalar quantities.
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de Freitas, G.B., Reall, H.S. Algebraically special solutions in AdS/CFT. J. High Energ. Phys. 2014, 148 (2014). https://doi.org/10.1007/JHEP06(2014)148
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DOI: https://doi.org/10.1007/JHEP06(2014)148