Relations between canonical and non-canonical inflation

被引：14
|
作者：
Gwyn, Rhiannon [1 ]
Rummel, Markus [2 ]
Westphal, Alexander [3 ]
机构：
[1] AEI Max Planck Inst Gravitat Phys, D-14476 Potsdam, Germany
[2] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany
[3] Deutsch Elektronen Synchrotron DESY, Theory Grp, D-22603 Hamburg, Germany
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2013年 / 12期
基金：
欧洲研究理事会;
关键词：
inflation; physics of the early universe; cosmological parameters from CMBR; CONSTRAINTS;
D O I：
10.1088/1475-7516/2013/12/010
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We look for potential observational degeneracies between canonical and noncanonical models of inflation of a single field phi. Non-canonical inflationary models are characterized by higher than linear powers of the standard kinetic term X in the effective Lagrangian p (X, phi) and arise for instance in the context of the Dirac-Born-Infeld (DBI) action in string theory. An on-shell transformation is introduced that transforms non-canonical inflationary theories to theories with a canonical kinetic term. The 2-point function observables of the original non-canonical theory and its canonical transform are found to match in the case of DBI inflation.
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收藏
页数：27
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