Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Polina Petriakova"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 5, Pp 1-11 (2023)
Abstract This paper discusses the origin of the small parameters with the aim of explaining the Hierarchy problem. The flexible extra dimensions are an essential tool in the process by which physical parameters are formed. The evolution of a multidim
Externí odkaz:
https://doaj.org/article/18a4c5dbfe6f4e34a2d984e8f11c79b4
Publikováno v:
Universe, Vol 10, Iss 3, p 137 (2024)
We apply a very simple procedure to construct non-singular cosmological models for flat Friedmann universes filled with minimally coupled scalar fields or by tachyon Born–Infeld-type fields. Remarkably, for the minimally coupled scalar field and th
Externí odkaz:
https://doaj.org/article/69f152a9486e4bfe98ea405328d3fad4
Autor:
Polina Petriakova, Sergey G. Rubin
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 11, Pp 1-11 (2022)
Abstract We develop an inflationary model without small parameters on the basis of multidimensional f(R) gravity with a minimally coupled scalar field. The model is described by two stages of space expansion. The first one begins at energy scales abo
Externí odkaz:
https://doaj.org/article/d26510216bd14c75b2cb52075088e9dc
Autor:
Polina Petriakova
Publikováno v:
Physics, Vol 3, Iss 2, Pp 379-385 (2021)
The possible ways of dynamics of a homogeneous and isotropic space described by the Friedmann–Lemaitre–Robertson–Walker metric in the framework of cubic in the Ricci scalar f(R) gravity in the absence of matter are considered. This paper points
Externí odkaz:
https://doaj.org/article/62c5341a09d7441d9ede2ecfc21d2aff
Publikováno v:
Symmetry, Vol 13, Iss 2, p 313 (2021)
We study the universe evolution starting from the sub-Planckian scale to present times. The requirement for an exponential expansion of the space with the observed metric as a final stage leads to significant restrictions on the parameter values of a
Externí odkaz:
https://doaj.org/article/b32ff1404b8f411e8cccc7d62d904389
Publikováno v:
Symmetry
Volume 13
Issue 2
Symmetry, Vol 13, Iss 313, p 313 (2021)
Volume 13
Issue 2
Symmetry, Vol 13, Iss 313, p 313 (2021)
We study the universe evolution starting from the sub-Planckian scale to present times. The requirement for an exponential expansion of the space with the observed metric as a final stage leads to significant restrictions on the parameter values of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03cba2e0601dfa18668a9699f1fd7292
http://arxiv.org/abs/2102.06890
http://arxiv.org/abs/2102.06890
Publikováno v:
Universe, Vol 6, Iss 187, p 187 (2020)
The aim of this review is to discuss the ways to obtain results based on gravity with higher derivatives in D-dimensional world. We considered the following ways: (1) reduction to scalar tensor gravity, (2) direct solution of the equations of motion,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::974dc60998959947c6696ade485c3b4a
http://arxiv.org/abs/2011.03848
http://arxiv.org/abs/2011.03848
Autor:
Polina Petryakova, Polina Petriakova
Publikováno v:
Physics
Volume 3
Issue 2
Pages 27-385
Physics, Vol 3, Iss 27, Pp 379-385 (2021)
Volume 3
Issue 2
Pages 27-385
Physics, Vol 3, Iss 27, Pp 379-385 (2021)
The possible ways of dynamics of a homogeneous and isotropic space described by the Friedmann–Lemaitre–Robertson–Walker metric in the framework of cubic in the Ricci scalar f(R) gravity in the absence of matter are considered. This paper points
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebdab8675a40ab2556ef91e9e8318a4f
http://arxiv.org/abs/2010.09918
http://arxiv.org/abs/2010.09918