Wilson line inflation

A. Avgoustidis, D. Cremades, F. Quevedo

Research output: Contribution to journalArticlepeer-review


We present a general setup for inflation in string theory where the inflaton field corresponds to Wilson lines in compact space in the presence of magnetic fluxes. T-dualities and limits on the value of the magnetic fluxes relate this system to the standard D-brane inflation scenarios, such as brane-antibrane inflation, D3/D7 brane inflation and different configurations of branes at angles. This can then be seen as a generalised approach to inflation from open string modes. Inflation ends when the Wilson lines achieve a critical value and an open string mode becomes tachyonic. Then hybrid-like inflation, including its cosmic string remnants, is realized in string theory beyond the brane annihilation picture. Our formalism can be incorporated within flux-induced moduli stabilisation mechanisms in type IIB strings. Also, contrary to the standard D-brane separation, Wilson lines can be considered in heterotic string models. We provide explicit examples to illustrate similarities and differences of our mechanism to D-brane inflation. In particular we present an example in which the η problem present in brane inflation models is absent in our case. We have examples with both blue and red tilted spectral index and remnant cosmic string tension Gμ ≲ 10-7.

Original languageEnglish (US)
Pages (from-to)1203-1234
Number of pages32
JournalGeneral Relativity and Gravitation
Issue number8
StatePublished - Aug 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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