Energy Conditions in a Generalized Second-Order Scalar-Tensor Gravity

被引：17

作者：

Sharif, M. ^{[1
]}

Waheed, Saira ^{[1
]}

机构：

[1] Univ Punjab, Dept Math, Quaid e Azam Campus, Lahore 54590, Pakistan

来源：

ADVANCES IN HIGH ENERGY PHYSICS | 2013年 / 2013卷

关键词：

HOLOGRAPHIC DARK ENERGY; ACCELERATING UNIVERSE; CHAPLYGIN-GAS; FIELD; COSMOLOGY; EQUATIONS; CONSTANT;

D O I：

10.1155/2013/253985

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The study of energy conditions has many significant applications in general relativistic and cosmological contexts. This paper explores the energy conditions in the framework of the most general scalar-tensor theory with field equations involving second-order derivatives. For this purpose, we use flat FRW universe model with perfect fluid matter contents. By taking power law ansatz for scalar field, we discuss the strong, weak, null, and dominant energy conditions in terms of deceleration, jerk, and snap parameters. Some particular cases of this theory like k-essence model, modified gravity theories and so forth. are analyzed with the help of the derived energy conditions, and the possible constraints on the free parameters of the presented models are determined.

引用

页数：15

共 59 条

[11] Can the dark energy equation-of-state parameter w be less than-1? -: art. no. 023509 [J].