2020/01/31 by Stéphane Detournay, Wout Merbis, Gim Seng Ng +1 · 1 citation
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1007/jhep11(2020)061
44 pages, 4 figures, 1 Mathematica file, added clarifications, matches published version
arxiv created 2021/01/04 · arxiv updated 2021/01/05
We study warped flat geometries in three-dimensional topologically massive gravity. They are quotients of global warped flat spacetime, whose isometries are given by the 2-dimensional centrally extended Poincaré algebra. The latter can be obtained as a certain scaling limit of Warped AdS3 space with a positive cosmological constant. We discuss the causal structure of the resulting spacetimes using projection diagrams. We study their charges and thermodynamics, together with asymptotic Killing vectors preserving a consistent set of boundary conditions including them. The asymptotic symmetry group is given by a Warped CFT algebra, with a vanishing current level. A generalization of the derivation of the Warped Cardy formula applies in this case, reproducing the entropy of the warped flat cosmological spacetimes.