On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum - INSPIRE

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On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum

Sera Cremonini
(
- Cambridge U., DAMTP and
- Texas A-M
)
,
Zygmunt Lalak
(
- Warsaw U.
)
,
Krzysztof Turzynski
(
- Warsaw U.
)

May, 2010

4 pages

Published in:

Phys.Rev.D 82 (2010) 047301

e-Print:

1005.4347 [hep-th]

DOI:

10.1103/PhysRevD.82.047301

Report number:

IFT-10-04,
DAMTP-2010-41,
MIFPA-10-20

View in:

ADS Abstract Service

reference search44 citations

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Abstract: (arXiv)

We argue that in models of inflation with two scalar fields and non-canonical kinetic terms there is a possibility of obtaining a red tilt of the power spectrum of curvature perturbations from noncanonicality-induced interactions between the curvature and isocurvature perturbations. We describe an extremely simple model realizing this idea, study numerically its predictions for the perturbations and discuss applications in realistic scenarios of inflation. We discuss to what extent in this model the scale of the inflationary potential can be decoupled from the amplitude of the density fluctuations.

Note:

typos corrected, discussion slightly modified, matches published version

11.25.Mj
98.80.Cq
04.62.+v
inflation
kinetic
power spectrum
effective Lagrangian
field equations: solution
numerical calculations

References(25)

Figures(2)

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