Zobrazeno 1 - 10
of 9 360
pro vyhledávání: '"inflation: model"'
Recent observations by pulsar timing arrays (PTAs) indicate a potential detection of a stochastic gravitational wave (GW) background. Metastable cosmic strings have been recognized as a possible source of the observed signals. In this paper, we propo
Externí odkaz:
http://arxiv.org/abs/2411.13299
Publikováno v:
Journal of Holography Applications in Physics 4 (3), 35-50 (2024)
In recent years, inflationary models have been studied from different perspectives using different conditions. Now, in this paper, we want to investigate the inverse monomial Inflation $(IMI)$ on the brane. We limit our results to the potentials of t
Externí odkaz:
http://arxiv.org/abs/2409.06488
Publikováno v:
Phys. Lett. B 849 (2024) 138457
In this paper, we introduce a weak, transient and periodical derivative coupling between the inflaton field and gravity, and find that the square of the sound speed of the curvature perturbations becomes a periodic function, which results in that the
Externí odkaz:
http://arxiv.org/abs/2401.07523
Autor:
Tye, Henry S. -H.
Combining previous results, the D3-anti-D3-brane pair potential U(T,{\phi}) is presented here, where the inflaton {\phi} measures the separation between the D3-brane and the anti-D3-brane, and the complex scalar mode T becomes tachyonic when the anni
Externí odkaz:
http://arxiv.org/abs/2311.07810
Autor:
Kamarpour, Mehran
We investigate the process of the Schwinger effect by axial coupling in the natural single-field inflation model in two parts. First we consider the Schwinger effect when the conformal invariance of Maxwell action should be broken by axial coupling $
Externí odkaz:
http://arxiv.org/abs/2307.00945
Autor:
Charles, Sébastien1 (AUTHOR), Dallery, Thomas2 (AUTHOR) thomas.dallery@univ-littoral.fr, Marie, Jonathan3 (AUTHOR)
Publikováno v:
International Journal of Political Economy. Jun2024, Vol. 53 Issue 2, p164-186. 23p.
Autor:
Kamarpour, Mehran
We investigate the influence of the tachyonic instability on the Schwinger effect in Higgs inflation model.In this work we identify the standard horizon scale $ k_{H}=aH $ and the tachyonic instability $ k_{H}=aH|\zeta| , \zeta=\frac{{I}^{\prime}\lef
Externí odkaz:
http://arxiv.org/abs/2307.15533
The first observations of the James Webb Space Telescope (JWST) have identified six massive galaxy candidates with the stellar masses $M_\ast\gtrsim 10^{10}\,M_\odot$ at high redshifts $7.4\lesssim z\lesssim 9.1$, with two most massive high-$z$ objec
Externí odkaz:
http://arxiv.org/abs/2306.05364
Autor:
Upadhyay, Sudhaker
Publikováno v:
JHAP 3, Winter 2023, 57
In this paper, we consider a non-minimally coupled gravity model to study the bouncing universe. The holographic principle has various effects on the bouncing universe. We choose some suitable new variables and achieve the new Hamiltonian and Lagrang
Externí odkaz:
http://arxiv.org/abs/2304.14273
Publikováno v:
JHEP 08 (2023) 201
We study baryogenesis in a hybrid inflation model which is embedded to the minimal supersymmetric model with right-handed neutrinos. Inflation is induced by a linear combination of the right-handed sneutrinos and its decay reheats the universe. The d
Externí odkaz:
http://arxiv.org/abs/2303.05663