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.

引用

页数：27

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