Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Svitek, O."'
Publikováno v:
Phys. Rev. D 108, 124076 (2023)
We study nonlinear matter models compatible with radiative Robinson--Trautman spacetimes and analyze their stability and well-posedness. The results lead us to formulate a conjecture relating the (in)stability and well/ill-posedness to the character
Externí odkaz:
http://arxiv.org/abs/2311.03110
Publikováno v:
Ann. Phys. 418 (2020) 168195
We study the quantum fate of a naked curvature singularity sourced by a scalar field via several methods and compare the results obtained. The first method relies on relativistic quantum mechanics on a fixed background employing the Klein--Gordon and
Externí odkaz:
http://arxiv.org/abs/1606.05635
Autor:
Svitek, O., Tahamtan, T.
Publikováno v:
Eur. Phys. J. C 78 (2018) 167
The thin-shell wormhole created using the Darmois-Israel formalism applied to Robinson-Trautman family of spacetimes is presented. The stress energy tensor created on the throat is interpreted in terms of two dust streams and it is shown that asympto
Externí odkaz:
http://arxiv.org/abs/1606.01501
Autor:
Tahamtan, T., Svitek, O.
Publikováno v:
Phys. Rev. D 94, 064031 (2016)
An explicit Robinson--Trautman solution with minimally coupled free scalar field was derived and analyzed recently. It was shown that this solution possesses a curvature singularity which is initially naked but later enveloped by a horizon. However,
Externí odkaz:
http://arxiv.org/abs/1603.07281
Autor:
Tahamtan, T., Svitek, O.
Publikováno v:
Eur. Phys. J. C 76 (2016) 335
Explicit Robinson--Trautman solutions with electromagnetic field satisfying nonlinear field equations are derived and analyzed. The solutions are generated from the spherically symmetric ones. In all cases the electromagnetic field singularity is rem
Externí odkaz:
http://arxiv.org/abs/1510.01183
Autor:
Tahamtan, T., Svitek, O.
Publikováno v:
Eur. Phys. J. C 77 (2017) 384
We derive an exact solution belonging to Kundt class of spacetimes both with and without a cosmological constant that are minimally coupled to a free massless scalar field. We show the algebraic type of these solutions and give interpretation of the
Externí odkaz:
http://arxiv.org/abs/1505.01791
Autor:
Tahamtan, T., Svitek, O.
Publikováno v:
Phys. Rev. D 91: 104032, 2015
Explicit Robinson-Trautman solution with minimally coupled free scalar field is derived and analyzed. It is shown that this solution contains curvature singularity which is initially naked but later the horizon envelopes it. We use quasilocal horizon
Externí odkaz:
http://arxiv.org/abs/1503.09080
Publikováno v:
In Annals of Physics July 2020 418
Autor:
Svitek, O., Tahamtan, T.
Publikováno v:
Gen. Rel. Grav. 48 (2016) 22
We present the ultrarelativistic boost of the general global monopole solution which is parametrized by mass and deficit solid angle. The problem is addressed from two different perspectives. In the first one the primary object for performing the boo
Externí odkaz:
http://arxiv.org/abs/1406.6334
Autor:
Tahamtan, T., Svitek, O.
Publikováno v:
Eur. Phys. J. C 74 (2014) 2987
We analyze the persistence of curvature singularities when analyzed using quantum theory. First, quantum test particles obeying the Klein-Gordon and Chandrasekhar-Dirac equation are used to probe the classical timelike naked singularity. We show that
Externí odkaz:
http://arxiv.org/abs/1312.7806