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Gao, X; Li, TJ; Shukla, P; Gao, X (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
Cosmological observables in multi-field inflation with a non-flat field space
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Language英语
KeywordMulticomponent Inflaton Scalar Ratio Spectrum Universe 2nd-order Scenario Flatness Formula Horizon Models
AbstractUsing delta N formalism in the context of a generic multi-field inflation driven on a non-flat field space background, we revisit the analytic expressions of the various cosmological observables such as scalar tensor power spectra, scalar/tensor spectral tilts, non-Gaussianity parameters, tensor-to-scalar ratio, and the various runnings of these observables. In our backward formalism approach, the subsequent expressions of observables automatically include the terms beyond the leading order slow-roll expansion correcting many of the expression at subleading order. To connect our analysis properly with the earlier results, we rederive the (well) known (single field) expressions in the limiting cases of our generic formulae. Further, in the light of PLANCK results, we examine for the compatibility of the consistency relations within the slow-roll regime of a two-field roulette poly-instanton inflation realized in the context, of large volume scenarios.
2014
ISSN1475-7516
Issue10Pages:8
Subject AreaPhysics
DOI10.1088/1475-7516/2014/10/008
Indexed BySCI
Funding OrganizationNatural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [201003833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Ca113-2012-0088] ; Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [201003833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Ca113-2012-0088] ; Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [201003833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Ca113-2012-0088] ; Natural Science Foundation of China [10821504, 11075194, 11135003, 11275246]; National Basic Research Program of China (973 Program) [201003833000]; Compagnia di San Paolo contract "Modern Application of String Theory" (MAST) [TO-Ca113-2012-0088]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15628
Collection理论物理所科研产出_SCI论文
Corresponding AuthorGao, X (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Gao, X,Li, TJ,Shukla, P,et al. Cosmological observables in multi-field inflation with a non-flat field space[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2014(10):8.
APA Gao, X,Li, TJ,Shukla, P,&Gao, X .(2014).Cosmological observables in multi-field inflation with a non-flat field space.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10),8.
MLA Gao, X,et al."Cosmological observables in multi-field inflation with a non-flat field space".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2014):8.
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