Features of de Sitter vacua in M-theory

Abstract

Abstract:We compute the masses of all moduli in the unstable deSitter vacua arising in the toy model of cosmological M-theory flux compactifications on the G 2 holonomy manifolds of [1]. The slow-roll parameters in the tachyonic directions are shown to be too large to be useful for conventional models of inflation. However, it appears that we can find fast roll regimes which could, under certain conditions, account for the current dark energy driven accelerated expansion of the universe. *

Higher order corrections to Heterotic M-theory inflation

“…We also note that the end of inflation is naturally understood to occur through the tunnelling of branes into the orbifold planes via instanton transition into the boundary; see [13][14][15] for some related work. After inflation, the remaining moduli can be stabilized in a de-Sitter vacuum [26][27][28] which is well controlled due to the known higher derivative corrections [29]. Unfortunately stabilizing the more general SU (3) structure case is still a work in progress, although it is likely that including gaugino condensation and following the proposals [30,31] will achieve this.…”