Warped spherical compactifications in the gravity theory
  We present new exact solutions of the warped spherical compactifications in the higher-dimensional gravitational theory coupled to scalar and several form field strengths. We find two classes of solutions. One has a de Sitter spacetime with a static warp factor. The other gives an accelerating universe in the non-Einstein conformal frame with a time-dependent warp factor. 
Masato Minamitsuji, Kunihito Uzawa
hep-th gr-qc