Inflation from higher dimensions

Inflation from Extra Dimensions

The radial mode of n extra compact dimensions (the radion, b) can cause inflation in theories where the fundamental gravity scale, M , is smaller than the Planck scale MP . For radion potentials V (b) with a simple polynomial form, to get the observed density perturbations, the energy scale of V (b) must greatly exceed M ∼ 1 TeV: V (b) ≡ MV ∼ 10−4MP . This gives a large radion mass and reheat t...

Inflation from Extra Dimensions

A gravity-driven inflation is shown to arise from a simple higher dimensional universe. In vacuum, the shear of n > 1 contracting dimensions is able to inflate the remaining three spatial dimensions. Said another way, the expansion of the 3-volume is accelerated by the contraction of the n-volume. Upon dimensional reduction, the theory is equivalent to a four dimensional cosmology with a dynami...

Gravitating multidefects from higher dimensions

Warped configurations admitting pairs of gravitating defects are analyzed. After devising a general method for the construction of multidefects, specific examples are presented in the case of higher-dimensional Einstein-Hilbert gravity. The obtained profiles describe diverse physical situations such as (topological) kink-antikink systems, pairs of non-topological solitons and bound configuratio...

Flavorful Supersymmetry from Higher Dimensions

We present models of flavorful supersymmetry in higher dimensions. The Higgs fields and the supersymmetry breaking field are localized in the same place in the extra dimension(s). The Yukawa couplings and operators generating the supersymmetry breaking parameters then receive the same suppression factors from the wavefunction profiles of the matter fields, leading to a specific correlation betw...

Higher Deficit Policies Lead to Higher Inflation