68 citations · 367 across the 25 of their papers we have counts for
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Symmetries of the asymptotically de Sitter spacetimes
Wojciech Kamiński, Maciej Kolanowski, Jerzy Lewandowski
We start a systematic investigation of possible isometries of the asymptotically de Sitter solutions to Einstein equations. We reformulate the Killing equation as conformal equatio…
Charges and Fluxes on (Perturbed) Non-expanding Horizons
Abhay Ashtekar, Neev Khera, Maciej Kolanowski +1
In a companion paper we showed that the symmetry group of non-expanding horizons (NEHs) is a 1-dimensional extension of the Bondi-Metzner-Sachs group …
Non-Expanding horizons: Multipoles and the Symmetry Group
Abhay Ashtekar, Neev Khera, Maciej Kolanowski +1
It is well-known that blackhole and cosmological horizons in equilibrium situations are well-modeled by non-expanding horizons (NEHs). In the first part of the paper we introduce m…
Towards the black hole uniqueness: transverse deformations of the extremal Reissner-Nordström-(A)dS horizon
Maciej Kolanowski
We study all transverse deformations of the extremal Reissner-Nordström-(A)dS horizon in the Einstein-Maxwell theory. No symmetry assumptions are needed. It is shown that for the g…
Hamiltonian charges in the asymptotically de Sitter spacetimes
Maciej Kolanowski, Jerzy Lewandowski
We generalize a notion of 'conserved' charges given by Wald and Zoupas to the asymptotically de Sitter spacetimes. Surprisingly, our construction is less ambiguous than the one enc…
Energy of gravitational radiation in the de Sitter universe at the scri and at a horizon
Maciej Kolanowski, Jerzy Lewandowski
In this note we investigate outcomes of a symplectic formula for the gravitational waves charges in the general relativity linearized around the de Sitter spacetime. We derive thei…
Dressed metric predictions revisited
Wojciech Kamiński, Maciej Kolanowski, Jerzy Lewandowski
It was recently shown that the volume operator of loop quantum cosmology (LQC) and all its positive powers are ill-defined on physical states. In this paper, we investigate how it…
Extremal horizons stationary to the second order: new constraints
Maciej Kolanowski, Jerzy Lewandowski, Adam Szereszewski
We consider non-expanding shear free (NE-SF) null surface geometries embeddable as extremal Killing horizons to the second order in Einstein vacuum spacetimes. A NE-SF null surface…
Symmetries of the Trautman retarded radial coordinates
Maciej Kolanowski, Jerzy Lewandowski
We consider spacetime described by observer that uses Trautman's retarded radial coordinates system. Given a metric tensor, we find all the symmetry maps. They set a 10 dimensional…