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Elliptic solutions of generalized Brans–Dicke gravity with a non-universal coupling
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- معلومة اضافية
- بيانات النشر:
Springer New York LLC
- الموضوع:
2020
- Collection:
NORA (National aggregator of open repositories of Russian universities) / Национальный агрегатор открытых репозиториев российских университетов
- نبذة مختصرة :
We study a model of the generalized Brans–Dicke gravity presented in both the Jordan and in the Einstein frames, which are conformally related. We show that the scalar field equations in the Einstein frame are reduced to the geodesics equations on the target space of the nonlinear sigma model. The analytical solutions in elliptical functions are obtained when the conformal couplings are given by reciprocal exponential functions. The behavior of the scale factor in the Jordan frame is studied using numerical computations. For certain parameters the solutions can describe an accelerated expansion. We also derive an analytical approximation in exponential functions. © 2014, The Author(s).
- Relation:
https://doi.org/10.1140/epjc/s10052-014-3125-7; https://openrepository.ru/article?id=255441
- Rights:
open access
- الرقم المعرف:
edsbas.80E9D74A
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