Recovering the Effective Cosmological Constant in Extended Gravity Theories

被引：0
|
作者：
S. Capozziello
R. de Ritis
A. A. Marino
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来源：
General Relativity and Gravitation | 1998年 / 30卷
关键词：
INFLATIONARY MODES; HIGHER-ORDER GRAVITY;
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摘要：
In the framework of extended gravity theories, we discuss the meaning of a time-dependent “cosmological constant” and give a set of conditions to recover an asymptotic de Sitter behaviour for a class of cosmological models independently of initial data. To this purpose we introduce a time-dependent (effective) quantity which asymptotically becomes the true cosmological constant. We will deal with scalar-tensor, fourth and higher than fourth-order theories.
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页码：1247 / 1272
页数：25
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