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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
Source PublicationPHYSICS LETTERS B
Language英语
KeywordCosmological Scaling Solutions Pseudo-goldstone Bosons Dark Energy Scalar Field Modified Gravity Models Potentials Constant Universe Lambda
AbstractWe 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
ISSN0370-2693
Volume731Issue:-Pages:342-349
Subject AreaPhysics
DOI10.1016/j.physletb.2014.03.013
Indexed BySCI
Funding OrganizationNational 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]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15792
Collection理论物理所科研产出_SCI期刊论文
Corresponding AuthorGong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Peoples R China.
Recommended Citation
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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