par Ciambelli, Luca 
;Detournay, Stéphane ;Somerhausen, Antoine
Référence Physical Review D, 102, 10, 106017
Publication Publié, 2020-11
;Detournay, Stéphane ;Somerhausen, Antoine Référence Physical Review D, 102, 10, 106017
Publication Publié, 2020-11
Article révisé par les pairs
| Résumé : | The phase space of three-dimensional gravity with Compere-Song-Strominger (CSS) boundary conditions is endowed with asymptotic symmetries consisting in the semidirect product of a Virasoro and a u^(1) Kač-Moody algebra, and contains Bañados-Teitelboim-Zanelli (BTZ) black holes whose entropy can be accounted for by the degeneracy of states of a warped Conformal Field Theory (CFT). By embedding these boundary conditions in topologically massive gravity, we observe the existence of two special points in the space of couplings parametrized by the AdS3 radius and the Chern-Simons coupling μ. When μ=±1, the asymptotic symmetries reduce to either a chiral Virasoro algebra or a pure u^(1) Kač-Moody current algebra. At those points, black holes have positive energy while that of linearized excitations are non-negative. |
