Entropy in conformal field theories and cosmology

Details Entropy in conformal field theories and cosmology Entropy in conformal field theories and cosmology

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..ses.fc004s&link_type=abstract

American Physical Society, 68th Annual Meeting of the APS Southeastern Section November 4 - 6, 2001 University of Virginia; Char

Physics

Scientific paper

We study the ratio of the entropy to the total energy in conformal field theories at finite temperature. For the free field realizations of \cal N=4 super Yang-Mills theory in D=4 and the (2,0) tensor multiplet in D=6, the ratio is bounded from above. The corresponding bounds are less stringent than the recently proposed Verlinde bound. We show that entropy bounds arise generically in CFTs in connection to monotonicity properties with respect to temperature changes of a generalized C-function. For strongly coupled CFTs with AdS duals, we show that the ratio obeys the Verlinde bound even in the presence of rotation. For such CFTs, we point out an intriguing resemblance in their thermodynamic formulas with the corresponding ones of two-dimensional CFTs. We show that simple scaling forms for the free energy and entropy of CFTs with AdS duals reproduce the thermodynamical properties of (D+1)-dimensional AdS black holes.

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