Zobrazeno 1 - 10
of 176
pro vyhledávání: '"H. Adami"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-36 (2024)
Abstract We study 4 dimensional (4d) gravitational waves (GWs) with compact wavefronts, generalizing Robinson-Trautman (RT) solutions in Einstein gravity with an arbitrary cosmological constant. We construct the most general solution of the GWs in th
Externí odkaz:
https://doaj.org/article/afc78119448f4ac99dc3abec53012b10
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 2024, Iss 2, Pp 1-36 (2024)
Abstract We study pure D dimensional Einstein gravity in spacetimes with a generic null boundary. We focus on the symplectic form of the solution phase space which comprises a 2D dimensional boundary part and a 2(D(D − 3)/2 + 1) dimensional bulk pa
Externí odkaz:
https://doaj.org/article/8fdd9de4ce234235817aed6dd81c84c5
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 7, Pp 1-42 (2023)
Abstract We study 3-dimensional gravity on a spacetime bounded by a generic 2-dimensional causal surface. We review the solution phase space specified by 4 generic functions over the causal boundary, construct the symplectic form over the solution sp
Externí odkaz:
https://doaj.org/article/a5b52a1e306c4eea9adc40d5677cc2a6
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 5, Pp 1-27 (2022)
Abstract We study 2d and 3d gravity theories on spacetimes with causal (timelike or null) codimension one boundaries while allowing for variations in the position of the boundary. We construct the corresponding solution phase space and specify bounda
Externí odkaz:
https://doaj.org/article/7cd6f9475b46411582d0057496a6d6c0
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-39 (2021)
Abstract We construct the boundary phase space in D-dimensional Einstein gravity with a generic given co-dimension one null surface N $$ \mathcal{N} $$ as the boundary. The associated boundary symmetry algebra is a semi-direct sum of diffeomorphisms
Externí odkaz:
https://doaj.org/article/852e1eb515dc41cf892423012f0eb92b
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:
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-10 (2020)
Abstract We present a three-dimensional Chern–Simons gravity based on a deformation of the Maxwell algebra. This symmetry allows introduction of a non-vanishing torsion to the Maxwell Chern–Simons theory, whose action recovers the Mielke–Baekle
Externí odkaz:
https://doaj.org/article/4ecc8d9f6ba64f96a578da53cb05b084
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