The general property of dynamical quintessence field

doi:10.1016/j.physletb.2014.03.013

ITP OpenIR > SCI期刊论文

	Gong, YG; Gong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Peoples R China.
	The general property of dynamical quintessence field
发表期刊	PHYSICS LETTERS B (IF:4.254[JCR-2017],3.968[5-Year])
语种	英语
关键词	Cosmological Scaling Solutions Pseudo-goldstone Bosons Dark Energy Scalar Field Modified Gravity Models Potentials Constant Universe Lambda
摘要	We discuss the general dynamical behaviors of quintessence field, in particular, the general conditions for tracking and thawing solutions are discussed. We explain what the tracking solutions mean and in what sense the results depend on the initial conditions. Based on the definition of tracking solution, we give a simple explanation on the existence of a general relation between w(phi) and Omega(phi) which is independent of the initial conditions for the tracking solution. A more general tracker theorem which requires large initial values of the roll parameter is then proposed. To get thawing solutions, the initial value of the roll parameter needs to be small. The power-law and pseudo-Nambu Goldstone boson potentials are used to discuss the tracking and thawing solutions. A more general w(phi)-Omega(phi) relation is derived for the thawing solutions. Based on the asymptotical behavior of the w(phi)-Omega(phi) relation, the flow parameter is used to give an upper limit on w'(phi) for the thawing solutions. If we use the observational constraint w(phi 0) < -0.8 and 0.2 < Omega(m0) < 0.4, then we require n less than or similar to 1 for the inverse power-law potential V(phi) = V-0(phi/m(pl)) (n) with tracking solutions and the initial value of the roll parameter vertical bar lambda(l)vertical bar < 1.3 for the potentials with the thawing solutions. (C) 2014 The Author. Published by Elsevier BAT. This is an open access article under the CC BY license (http:creativecommons.org/licenses/by/3.0/).
	2014
ISSN	0370-2693
卷号	731 期号:-页码:342-349
学科领域	Physics
DOI	10.1016/j.physletb.2014.03.013
收录类别	SCI
项目资助者	National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University [NCET-12-0205]; Fundamental Research Funds for the Central Universities [2013YQ055] ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University [NCET-12-0205]; Fundamental Research Funds for the Central Universities [2013YQ055] ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University [NCET-12-0205]; Fundamental Research Funds for the Central Universities [2013YQ055] ; National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University [NCET-12-0205]; Fundamental Research Funds for the Central Universities [2013YQ055]
引用统计	被引频次：9[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/311006/15792
专题	SCI期刊论文
通讯作者	Gong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Peoples R China.
推荐引用方式 GB/T 7714	Gong, YG,Gong, YG . The general property of dynamical quintessence field[J]. PHYSICS LETTERS B,2014,731(-):342-349.
APA	Gong, YG,&Gong, YG .(2014).The general property of dynamical quintessence field.PHYSICS LETTERS B,731(-),342-349.
MLA	Gong, YG,et al."The general property of dynamical quintessence field".PHYSICS LETTERS B 731.-(2014):342-349.

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