Generic feature of future crossing of phantom divide in viable f(R) gravity models

被引：50
|
作者：
Bamba, Kazuharu [1 ]
Geng, Chao-Qiang [1 ]
Lee, Chung-Chi [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2010年 / 11期
关键词：
modified gravity; dark energy theory; BLACK-HOLE ENTROPY; F R GRAVITY; DARK ENERGY; COSMOLOGICAL CONSTANT; NOETHER CHARGE; CONSTRAINTS; THERMODYNAMICS; CONSISTENT; SUPERNOVAE; INFLATION;
D O I：
10.1088/1475-7516/2010/11/001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the equation of state for dark energy and explicitly demonstrate that the future crossings of the phantom divide line w(DE) = -1 are the generic feature in the existing viable f(R) gravity models. We also explore the future evolution of the cosmological horizon entropy and illustrate that the cosmological horizon entropy oscillates with time due to the oscillatory behavior of the Hubble parameter. The important cosmological consequence is that in the future, the sign of the time derivative of the Hubble parameter changes from negative to positive in these viable f(R) gravity models.
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收藏
页数：11
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