A dark energy model characterized by the age of the universe

被引：487
作者：
Cai, Rong-Gen [1 ]
机构：
[1] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
来源：
PHYSICS LETTERS B | 2007年 / 657卷 / 4-5期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physletb.2007.09.061
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Quantum mechanics together with general relativity leads to the Karolyhazy relation and a corresponding energy density of quantum fluctuations of space-time. Based on the energy density we propose a dark energy model, in which the age of the universe is introduced as the length measure. This dark energy is consistent with astronomical data if the unique numerical parameter in the dark energy model is taken to be a number of order one. The dark energy behaves like a cosmological constant at early time and drives the universe to an eternally accelerated expansion with power-law form at late time. In addition, we point out a subtlety in this kind of dark energy model. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：228 / 231
页数：4
相关论文
共 18 条
[1]  
[Anonymous], 1982, PHYS NATURAL PHILOS
[2]   From spacetime foam to holographic foam cosmology [J].
Arzano, Michele ;
Kephart, Thomas W. ;
Ng, Y. Jack .
PHYSICS LETTERS B, 2007, 649 (04) :243-246
[3]   Probing spacetime foam with extragalactic sources [J].
Christiansen, WA ;
Ng, YJ ;
van Dam, H .
PHYSICAL REVIEW LETTERS, 2006, 96 (05)
[4]   Effective field theory, black holes, and the cosmological constant [J].
Cohen, AG ;
Kaplan, DB ;
Nelson, AE .
PHYSICAL REVIEW LETTERS, 1999, 82 (25) :4971-4974
[5]   Entropy bounds and dark energy [J].
Hsu, SDH .
PHYSICS LETTERS B, 2004, 594 (1-2) :13-16
[6]   GRAVITATION AND QUANTUM MECHANICS OF MACROSCOPIC OBJECTS [J].
KAROLYHA. .
NUOVO CIMENTO A, 1966, 42 (02) :390-+
[7]  
Karolyhazy F., 1986, Quantum Concepts in Space and Time, Ved, ppp 109
[8]   A model of holographic dark energy [J].
Li, M .
PHYSICS LETTERS B, 2004, 603 (1-2) :1-5
[9]  
MAZIASHVILI M, GRQC0612110
[10]  
MAZIASHVILI M, ARXIV07050924
12