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When scalar field is kinetically coupled to the Einstein tensor
Gao, Changjun; Gao, CJ , Chinese Acad Sci, NAOC, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2010
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号6页码:-
摘要We explore the cosmic evolution of a scalar field with the kinetic term coupled to the Einstein tensor. We find that, in the absence of other matter sources or in the presence of only pressureless matter, the scalar behaves as pressureless matter and the sound speed of the scalar is vanishing. These properties enable the scalar field to be a candidate of cold dark matter. By also considering the scalar potential, we find the scalar field may play the role of both dark matter and dark energy. In this case, the equation of state of the scalar can cross the phantom divide, but this can lead to the sound speed becoming superluminal as it crosses the divide, and so is physically forbidden. Finally, if the kinetic term is coupled to more than one Einstein tensor, we find the equation of state is always approximately equal to -1 whether the potential is flat or not, and so the scalar may also be a candidate for the inflaton.
部门归属[Gao, CJ] Chinese Acad Sci, NAOC, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China; [Gao, CJ] Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China
关键词Nonminimal Derivative Couplings Quintom-dark-energy Cosmological Consequences Gravity Inflation Component Evolution Constant Equation Universe
学科领域Physics
资助者National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004]
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收录类别SCI
资助者National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004] ; National Science Foundation of China[10533010, 10575004, 10973014]; 973 Project[2010CB833004]
WOS记录号WOS:000279604500010
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被引频次:51[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5101
专题理论物理所SCI论文
通讯作者Gao, CJ , Chinese Acad Sci, NAOC, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
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Gao, Changjun,Gao, CJ , Chinese Acad Sci, NAOC, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China. When scalar field is kinetically coupled to the Einstein tensor[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2010(6):-.
APA Gao, Changjun,&Gao, CJ , Chinese Acad Sci, NAOC, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China.(2010).When scalar field is kinetically coupled to the Einstein tensor.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(6),-.
MLA Gao, Changjun,et al."When scalar field is kinetically coupled to the Einstein tensor".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .6(2010):-.
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