Zobrazeno 1 - 10
of 6 932
pro vyhledávání: '"A. Podolsky"'
We investigate a complete family of spacetimes which represent black holes with rotation, NUT twist, acceleration, electric and magnetic charges. These are exact solutions of the Einstein-Maxwell equations with any cosmological constant, such that th
Externí odkaz:
http://arxiv.org/abs/2409.02308
Autor:
Maeda, Hideki, Podolsky, Jiri
Under the (anti-)self-dual condition for orthonormal components of the Faraday tensor, the 3D Einstein-Maxwell system with a negative cosmological constant $\Lambda$ admits a solution obtained by Kamata and Koikawa and later by Cataldo and Salgado in
Externí odkaz:
http://arxiv.org/abs/2408.16056
We introduce a numerical method to study critical properties near classical and quantum phase transitions. Our method applies ideas of the Tensor Renormalization Group to obtain an improved action which is used to extract critical properties by perfo
Externí odkaz:
http://arxiv.org/abs/2408.06414
A computational phase transition in a classical or quantum system is a non-analytic change in behavior of an order parameter which can only be observed with the assistance of a nontrivial classical computation. Such phase transitions, and the computa
Externí odkaz:
http://arxiv.org/abs/2407.18405
The criterion for existence of gravitational radiation at conformal infinity in the presence of a positive cosmological constant is applied to a general family of exact solutions representing generic (pairs of) black holes of algebraic type D. Our an
Externí odkaz:
http://arxiv.org/abs/2407.14863
In quantum mechanics, measurements are dynamical processes and thus they should be capable of inducing currents. The symmetries of the Hamiltonian and measurement operator provide an organizing principle for understanding the conditions for such curr
Externí odkaz:
http://arxiv.org/abs/2405.05946
Recent advances in ultrafast electron emission, microscopy, and diffraction have demonstrated a remarkable ability to manipulate free electrons with quantum coherence using light beams. Here, we present a framework for exploring free electron quantum
Externí odkaz:
http://arxiv.org/abs/2401.00723
Autor:
Maeda, Hideki, Podolsky, Jiri
Publikováno v:
Class.Quant.Grav. 41 (2024) 11, 115012
We revisit the charged rotating Ba\~nados-Teitelboim-Zanelli (BTZ) solution in the three-dimensional Einstein-Maxwell-$\Lambda$ system. After the erroneous announcement of its discovery at the end of the original BTZ paper in 1992, the solution was f
Externí odkaz:
http://arxiv.org/abs/2311.07671
Autor:
Papajcik, Matus, Podolsky, Jiri
Publikováno v:
Class.Quant.Grav. 41 (2024) 11, 115008
We present a convenient method of algebraic classification of 2+1 spacetimes into the types I, II, D, III, N and O, without using any field equations. It is based on the 2+1 analogue of the Newman-Penrose curvature scalars $\Psi_A$ of distinct boost
Externí odkaz:
http://arxiv.org/abs/2311.00872
Autor:
Podolsky, Jiri, Papajcik, Matus
Publikováno v:
Phys. Rev. D 108, L121504 (2023)
A new effective approach to the algebraic classification of geometries in 2+1 gravity is presented. It uses five real Cotton scalars $\Psi_A$ of distinct boost weights, which are 3D analogues of the Newman-Penrose scalars representing the Weyl tensor
Externí odkaz:
http://arxiv.org/abs/2310.10528