Abstract
We study the production of spin particles in homogeneous scalar and gravitational backgrounds using the mode-mixing Bogolyubov method. Considering only the helicity states, we can reduce the problem to a standard Dirac fermion calculation and apply the standard techniques in a straightforward way. As an example we consider a specific supergravity inflationary model and calculate the spectrum of gravitinos created during preheating at the end of inflation.
- Received 9 April 1999
DOI:https://doi.org/10.1103/PhysRevLett.84.1655
©2000 American Physical Society