Non-Extremal D-instantons and the AdS/CFT Correspondence

Abstract

We investigate non-extremal D-instantons in an asymptotically $Ad{S}_5\times S^5$ background and the role they play in the $Ad{S}_5/CF{T}_4$ correspondence. We find that the holographic dual operators of non-extremal D-instanton configurations do not correspond to self-dual Yang-Mills instantons, and we compute explicitly the deviation from self-duality. Furthermore, a class of non-extremal D-instantons yield Euclidean axionic wormhole solutions with two asymptotic boundaries. After Wick rotating, this provides a playground for investigating holography in the presence of cosmological singularities in a closed universe.

30 pages, 3 figures

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