Emission of primordial bosonic radiation during inflation

We study the emission of neutral massless $(1,2)\mathrm{\hslash }$-spin bosons during power-law inflation using unified spinor field theory. We shows that during inflation gravitons and photons were emitted with wavelengths (on physical coordinates) that increase as the Hubble radius: ${\lambda }_{Ph}\sim a\mathrm{/}H$. The quantised action related to these bosons is calculated and results to be a fraction of the Planck constant.