Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Ramazanov, S."'
Publikováno v:
JCAP09(2024)047
Employing the publicly available CosmoLattice code, we conduct numerical simulations of a domain wall network and the resulting gravitational waves (GWs) in a radiation-dominated Universe in the $Z_2$-symmetric scalar field model. In particular, the
Externí odkaz:
http://arxiv.org/abs/2406.17053
The effect of an ionic core on the temperature relaxation in dense hot plasma of beryllium is studied using the pseudpotential model by Gericke et al [Phys. Rev. E 2010, 81, 065401(R)]. Employing the screened version of the ion pseudpotential [by Ram
Externí odkaz:
http://arxiv.org/abs/2310.12717
Publikováno v:
Phys. Rev. D 108, 123529 (2023)
We discuss cosmic domain walls described by a tension red-shifting with the expansion of the Universe. These melting domain walls emit gravitational waves with the low-frequency spectral shape $\Omega_{gw}\propto f^{2}$ corresponding to the spectral
Externí odkaz:
http://arxiv.org/abs/2307.04582
Publikováno v:
JCAP04(2022)028
Cosmic domain walls are harmless, provided that their tension decreases with expansion of the Universe. This setup can be realized, if the scale of spontaneous symmetry breaking is induced dynamically through the interaction with hot primordial plasm
Externí odkaz:
http://arxiv.org/abs/2112.12608
Publikováno v:
Revista Mexicana De F\'isica 68 (2 Mar-Apr):020502 1-0, 2022
Inspired by the physics of the Miyake - Narikiyo model (MN) for superconductivity in the {\gamma} sheet of $Sr_2RuO_4$ to investigate numerically the behavior caused by a non-magnetic disorder in the imaginary part of the elastic scattering matrix fo
Externí odkaz:
http://arxiv.org/abs/2108.04170
Publikováno v:
Phys. Rev. D 105, 063530 (2022)
We propose a novel scenario of Dark Matter production naturally connected with generation of gravitational waves. Dark Matter is modelled as a real scalar, which interacts with the hot primordial plasma through a portal coupling to another scalar fie
Externí odkaz:
http://arxiv.org/abs/2104.13722
Publikováno v:
JCAP09(2020)059
We discuss the gravitational creation of superheavy particles $\chi$ in an inflationary scenario with a quartic potential and a non-minimal coupling between the inflaton $\varphi$ and the Ricci curvature: $\xi \varphi^2 R/2$. We show that for large c
Externí odkaz:
http://arxiv.org/abs/2006.02225
Publikováno v:
JCAP03(2017)039
Several early Universe scenarios predict a direction-dependent spectrum of primordial curvature perturbations. This translates into the violation of the statistical isotropy of cosmic microwave background radiation. Previous searches for statistical
Externí odkaz:
http://arxiv.org/abs/1612.02347
Publikováno v:
JHEP06(2016)020
We consider the branch of the projectable Horava-Lifshitz model which exhibits ghost instabilities in the low energy limit. It turns out that, due to the Lorentz violating structure of the model and to the presence of a finite strong coupling scale,
Externí odkaz:
http://arxiv.org/abs/1601.05405
Autor:
Rubtsov, G. I., Ramazanov, S. R.
Publikováno v:
Phys. Rev. D 91, 043514 (2015)
We revisit constraints on the (pseudo)conformal Universe from the non-observation of statistical anisotropy in the Planck data. The quadratic maximal likelihood estimator is applied to the Planck temperature maps at frequencies 143 GHz and 217 GHz as
Externí odkaz:
http://arxiv.org/abs/1406.7722