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Conical defects in higher spin theories
A bstractWe study conical defect geometries in the SL(N,$ \mathbb{R} $) × SL(N,$ \mathbb{R} $) (and SL(N,$ \mathbb{C} $)) Chern-Simons formulation of higher spin gauge theories in AdS3. We argue thatExpand
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The semiclassical limit of WN CFTs and Vasiliev theory
A bstractWe propose a refinement of the Gaberdiel-Gopakumar duality conjecture between WN conformal field theories and 2+1-dimensional higher spin gravity. We make an identification of genericExpand
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Comments on D-brane interactions in PP-wave backgrounds
We calculate the interaction potential between widely separated D-branes in PP-wave backgrounds in string theory as well as in low-energy supergravity. Timelike and spacelike orientations areExpand
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Multi-centered AdS3 solutions from Virasoro conformal blocks
A bstractWe revisit the construction of multi-centered solutions in three-dimensional anti-de Sitter gravity in the light of the recently discovered connection between particle worldlines andExpand
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Quantization of conical spaces in 3D gravity
A bstractWe discuss the quantization and holographic aspects of a class of conical spaces in 2+1 dimensional pure AdS gravity. These appear as topological solitons in the Chern-Simons formulation ofExpand
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The tachyon potential in Witten's superstring field theory
We study the tachyon potential in the NS sector of Witten's cubic superstring field theory. In this theory, the pure tachyon contribution to the potential has no minimum. We find that this remainsExpand
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Tachyonic inflation in a warped string background
We analyze observational constraints on the parameter space of tachyonic inflation with a gaussian potential and discuss some predictions of this scenario. As was shown by Kofman and Linde, it isExpand
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Microstate solutions from black hole deconstruction
A bstractWe present a new family of asymptotic AdS3 × S2 solutions to eleven dimensional supergravity compactified on a Calabi-Yau threefold. They originate from the backreaction of S2-wrappedExpand
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Level four approximation to the tachyon potential in superstring field theory
We compute the tachyon potential to level 4 in NS superstring field theory. We obtain 89% of the conjectured vacuum energy.
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Quantizing higher-spin gravity in free-field variables
A bstractWe study the formulation of massless higher-spin gravity on AdS3 in a gauge in which the fundamental variables satisfy free field Poisson brackets. This gauge choice leaves a small portionExpand
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