Spectra and entropy of multi-field warm inflation

Understand

We study the power spectra and entropy of two-field warm inflationary scenario with canonical condition which is described by many-dimensional stochastic differential equations.

• The field perturbations are analytically calculated via a Volterra integral equation of the second kind, based on which we obtain a spectra with leading order and first order of slow-roll parameters.
• We also find the evolutions of background are not independent but relying on dissipative coefficients, which is distinguished from that in cold inflation.
• Then, we calculate the entropy on the basis of statistical physics theory by introducing an entropy matrix.