Very large angular scales and very high energy physics

摘要: Abstract The early production of gravitational waves in different inflationary scenarios is most simply analyzed a conformally transformed metric where it possible to write and discuss simple expression for their amplitude at the post-inflationary horizon reenter. Three special cases are considered here: generalized gravity lagrangians L ( R ), scalar-tensor, multidimensional (or Kaluza-Klein) theories. In latter case any upper limit on Δ T / may set lower bound compactification ratio inner radius b t )/ 0 during de Sitter phase.