Direct detection of primordial gravitational waves in a BSI inflationary model

We investigate the possibility for a direct detection by future space interferometers of the stochastic gravitational wave (GW) background generated during the inflationary stage in a class of viable ΛCDM BSI models. At frequencies around 10−3 Hz, maximal values Ωgw(ν)∼3×10−15 are found, an improvement of about one order of magnitude compared to single-field, slow-roll inflationary models. This is presumably not sufficient in order to be probed in the near future.