López Maroto, AntonioMazumdar, Anupam2023-06-202023-06-202000-02-210031-900710.1103/PhysRevLett.84.1655https://hdl.handle.net/20.500.14352/59334© 2000 The American Physical Society. A. L. M. acknowledges support from the SEUID-Royal Society and (CICYT-AEN97-1693) (Spain). A. M. is supported by INLAKS and ORS. We thank Andrew Liddle for valuable discussions.We study the production of spin 3/2 particles in homogeneous scalar and gravitational backgrounds using the mode-mixing Bogolyubov method. Considering only the helicity +/-3/2 states, we can reduce the problem to a standard Dirac fermion calculation and apply the standard techniques in a straight forward 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.engjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.84.1655http://journals.aps.org/open access53InflationGravitinoSupersymmetrySupergravityCosmologyUniverseFísica (Física)22 Física