Zobrazeno 1 - 10
of 252
pro vyhledávání: '"M.M. Sheikh-Jabbari"'
Publikováno v:
Physics Letters B, Vol 855, Iss , Pp 138835- (2024)
We develop the framework that reveals the intrinsic conserved stress tensor and current associated with the null infinity of a three-dimensional (3d) asymptotically flat spacetime. These are, respectively, canonical conjugates of degenerate metric an
Externí odkaz:
https://doaj.org/article/49d67ce4cd094a75a72fc83057f6530e
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-41 (2021)
Abstract We study surface charges on a generic null boundary in three dimensional topological massive gravity (TMG). We construct the solution phase space which involves four independent functions over the two dimensional null boundary. One of these
Externí odkaz:
https://doaj.org/article/7b5132a2e7c244218ddb817b6defb10d
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 10, Pp 1-37 (2020)
Abstract We carry out in full generality and without fixing specific boundary conditions, the symmetry and charge analysis near a generic null surface for two and three dimensional (2d and 3d) gravity theories. In 2d and 3d there are respectively two
Externí odkaz:
https://doaj.org/article/7d18daf7d2c742a3a2d49588746b8528
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-38 (2020)
Abstract Expanding around null hypersurfaces, such as generic Kerr black hole horizons, using co-rotating Kruskal-Israel-like coordinates we study the associated surface charges, their symmetries and the corresponding phase space within Einstein grav
Externí odkaz:
https://doaj.org/article/b5e447c4cb5e4c0a95e52805e209f35a
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 3, Pp 1-23 (2020)
Abstract We develop basic tools and matching conditions to interpolate between asymptotic and near horizon symmetries. We focus on black holes in three dimensions. In particular, we match Brown-Henneaux boundary conditions at infinity, which yields t
Externí odkaz:
https://doaj.org/article/f8378994faf0404a9dc46eb3f4e4bb8e
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 12, Pp 1-34 (2019)
Abstract We study asymptotic symmetries and their associated charges for Maxwell theory on anti de Sitter (AdS) background in any dimension. This is obtained by con- structing a conserved symplectic structure for the bulk and a theory on the boundary
Externí odkaz:
https://doaj.org/article/2e7c140317cf4a82acf9b91282ba06e1
Publikováno v:
Physics Letters B, Vol 818, Iss , Pp 136366- (2021)
Quasars show considerable promise as standard candles in a high-redshift window beyond Type Ia supernovae. Recently, Risaliti, Lusso & collaborators [1–3] have succeeded in producing a high redshift Hubble diagram (z≲7) that supports “a trend w
Externí odkaz:
https://doaj.org/article/79c7947e85d147908c5e7912886e3abf
Publikováno v:
Physics Letters B, Vol 812, Iss , Pp 136002- (2021)
It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of grav
Externí odkaz:
https://doaj.org/article/60bb9c4b50a841738f9dbc66270a7107
Publikováno v:
Physics Letters B, Vol 806, Iss , Pp 135503- (2020)
We consider Einstein gravity on a patch of AdS3 spacetime between two radii r1,r2. We compute surface charges and their algebra at an arbitrary radius r such that it reduces to a given set of surface charges at r1,r2. The r-dependent charges become i
Externí odkaz:
https://doaj.org/article/cf953688ee594e7b928ca40507eb9901
Publikováno v:
Physics Letters B, Vol 772, Iss C, Pp 586-591 (2017)
We investigate dynamics of probe particles moving in the near-horizon limit of (2N+1)-dimensional extremal Myers–Perry black hole with arbitrary rotation parameters. We observe that in the most general case with non-equal non-vanishing rotational p
Externí odkaz:
https://doaj.org/article/553c68214aa14880a5924ae9ed3064d9