Cosmologies from Nonlinear Multidimensional Gravity with Acceleration and Slowly Varying G

We consider multidimensional gravity with a Lagrangian containing the Ricci tensor squared and the Kretschmann invariant. In a Kaluza-Klein approach with a single compact extra space of arbitrary dimension, with the aid of a slow-change approximation (as compared with the Planck scale), we build a class of spatially flat cosmological models in which both the observed scale factor a(tau) and the extra-dimensional one, b(tau), grow exponentially at large times, but b(t) grows slowly enough to admit variations of the effective gravitational constant G within observational limits. Such models predict a drastic change in the physical laws of our Universe in the remote future due to further growth of the extra dimensions.

Авторы
Bronnikov K.A. 1, 2 , Kononogov S.A.1 , Melnikov V.N. 1, 2 , Rubin S.G.3
Номер выпуска
3
Язык
Английский
Страницы
230-234
Статус
Опубликовано
Том
14
Год
2008
Организации
  • 1 VNIIMS, Ctr Gravitat & Fundamental Metrol, Moscow 119361, Russia
  • 2 Patrice Lumumba Peoples Friendship Univ, Inst Gravitat & Cosmol, Moscow 117198, Russia
  • 3 Moscow State Engn Phys Inst, Moscow 115409, Russia
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/8711/