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High Energy Physics - Theory

arXiv:0706.2215 (hep-th)
[Submitted on 15 Jun 2007 (v1), last revised 14 Aug 2007 (this version, v2)]

Title:Constraints on the spectral index for the inflation models in string landscape

Authors:Qing-Guo Huang
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Abstract: We conjecture that the inflation models with trans-Planckian excursions in the field space should be in the swampland. We check this conjecture in a few examples and investigate the constraints on the spectral index for the slow-roll inflation model in string landscape where the variation of inflaton during the period of inflation is less than the Planck scale $M_p$. A red primordial power spectrum with a lower bound on the spectral index is preferred. Both the tensor-scalar ratio and the running can be ignored.
Comments: 5 pages, 1 figure; refs added, version for publication in Phys.Rev.D (rapid communication)
Subjects: High Energy Physics - Theory (hep-th); Astrophysics (astro-ph)
Cite as: arXiv:0706.2215 [hep-th]
  (or arXiv:0706.2215v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.0706.2215
Journal reference: Phys.Rev.D76:061303,2007
Related DOI: https://doi.org/10.1103/PhysRevD.76.061303

Submission history

From: Qing-Guo Huang [view email]
[v1] Fri, 15 Jun 2007 02:36:44 UTC (67 KB)
[v2] Tue, 14 Aug 2007 23:08:58 UTC (67 KB)
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