Zobrazeno 1 - 10
of 2 305
pro vyhledávání: '"Adami, H."'
We reconsider formulating $D$ dimensional gauge theories, with the focus on the case of gravity theories, in spacetimes with boundaries. We extend covariant phase space formalism to the cases in which boundaries are allowed to fluctuate. We analyze t
Externí odkaz:
http://arxiv.org/abs/2407.03259
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
Externí odkaz:
http://arxiv.org/abs/2405.00149
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 the prese
Externí odkaz:
http://arxiv.org/abs/2402.17658
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 part. The s
Externí odkaz:
http://arxiv.org/abs/2311.03515
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 space and t
Externí odkaz:
http://arxiv.org/abs/2305.01009
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 boundary degree
Externí odkaz:
http://arxiv.org/abs/2202.12129
Publikováno v:
Phys. Rev. D 105, 066004 (2022)
We establish that boundary degrees of freedom associated with a generic co-dimension one null surface in $D$ dimensional pure Einstein gravity naturally admit a thermodynamical description. We expect the $\textit{null surface thermodynamics}$ to univ
Externí odkaz:
http://arxiv.org/abs/2110.04224
Publikováno v:
JHEP 11 (2021) 155
We construct the boundary phase space in $D$-dimensional Einstein gravity with a generic given co-dimension one null surface ${\cal N}$ as the boundary. The associated boundary symmetry algebra is a semi-direct sum of diffeomorphisms of $\cal N$ and
Externí odkaz:
http://arxiv.org/abs/2110.04218
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 functions
Externí odkaz:
http://arxiv.org/abs/2104.03992
Publikováno v:
JHEP 10 (2020) 107
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 and thre
Externí odkaz:
http://arxiv.org/abs/2007.12759