Central Charge for 2D Gravity on AdS(2) and AdS(2)/CFT(1) Correspondence

Abstract

We study 2D Maxwell-dilaton gravity on AdS(2). We distinguish two distinctive cases depending on whether the AdS(2) solution can be lifted to an AdS(3) geometry. In both cases, in order to get a consistent boundary condition we need to work with a twisted energy momentum tensor which has non-zero central charge. With this central charge and the explicit form of the twisted Virasoro generators we compute the entropy of the system using the Cardy formula. The entropy is found to be the same as that obtained from gravity calculations for a specific value of the level of the U(1) current. The agreement is an indication of $AdS(2)/CFT(1) correspondence.

12 pages, latex file; V2: typos corrected, refs added. V3: Corrections and clarifications in section two; conclusion didn't change, few comments added, typos corrected

References in corpus (6)

• Chiral Gravity in Three Dimensions
• Entropy Function and AdS(2)/CFT(1) Correspondence
• Fundamental Strings, Holography, and Nonlinear Superconformal Algebras
• Fundamental Superstrings as Holograms
• Nearing the Horizon of a Heterotic String
• Heterotic Coset Models of Microscopic Strings and Black Holes

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