Inflationary epoch in the presence of holographic dark energy
  We analyze the effects of the holographic dark energy model in a single field
slow-roll inflation, taking into account both the holographic and the dark
radiation components. In particular, we obtain the background evolution and
compute the scalar and tensor power spectra. For the scalar sector we show that
the power spectrum of the curvature perturbation encompasses the standard
single field result and a correction proportional to $\Omega_{\rm
hde}/\epsilon$, where $\Omega_{\rm hde}$ is the fractional density of the
holographic component and $\epsilon$ is the first slow-roll parameter. This
correction might be of order unity in the very beginning of the inflationary
phase and decays rapidly, which makes it relevant only for modes that crossed
the horizon during the first e-folds of inflation. For the primordial
gravitational waves we find the spectral index receives a correction from the
graviton mass term, and it can be blue-tilted, depending on the mass of the
tensor mode.
