1302.0172 (Suratna Das)

Primordial non-Gaussianity as a signature of pre-inflationary radiation era    [PDF]

Suratna Das

Primordial non-Gaussianity generated in an inflationary model where inflation is preceded by a radiation era is discussed. It is shown that both bispectrum and trispectrum non-Gaussianities are enhanced due to the presence of pre-inflationary radiation era. One distinguishing feature of such a scenario is that the trispectrum non-Gaussianity is larger than the bispectrum one.

View original: http://arxiv.org/abs/1302.0172