Temperature effect on the power spectrum in inflation
  We examine the effect of the thermal vacuum on the power spectrum of
inflation by using the thermal field dynamics. We find that the thermal effect
influences the CMB anisotropy at large length scale. After removing the
divergence by using the holographic cutoff, we observe that the thermal vacuum
explains well the observational CMB result at low multipoles. This shows that
the temperature dependent factor should be considered in the study of power
spectrum in inflation, especially at large length scale.
