Linear inflation from running kinetic term in supergravity

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82 Citations (Scopus)


We propose a new class of inflation models in which the coefficient of the inflaton kinetic term rapidly changes with energy scale. This naturally occurs especially if the inflaton moves over a long distance during inflation as in the case of large-scale inflation. The peculiar behavior of the kinetic term opens up a new way to construct an inflation model. As a concrete example we construct a linear inflation model in supergravity. It is straightforward to build a chaotic inflation model with a fractional power along the same line. Interestingly, the potential takes a different form after inflation because of the running kinetic term.

Original languageEnglish
Pages (from-to)140-143
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2
Publication statusPublished - 2010 Sep
Externally publishedYes


  • Inflation
  • Supergravity

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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