Time-dependent correlations of inflationary perturbations
Institute of Physics, Academia Sinica - Taipei, Taiwan 11529,
2 Department of Physics, University of Arizona - Tucson, AZ 85721, USA
Accepted: 21 September 2001
We show that if the primordial classical perturbations were generated by the gravitational particle creation during inflation, and followed by an evolution of quantum-to-classical transition, the time-dependent correlation of these perturbations is long-tailed with a correlation time larger than the Hubble time. Consequently, the inflationary perturbations are locally scale-scale correlated. Hence, the interaction of the fields during inflation can be explored via the detection of the local scale-scale correlation of the CMB fluctuations.
PACS: 98.70.Vc – Background radiations / 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)
© EDP Sciences, 2001