Phys. Rev. Lett. 84, 1655–1658 (2000)Production of Spin 3/2 Particles from Vacuum FluctuationsReceived 9 April 1999; published in the issue dated 21 February 2000 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 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. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.1655
DOI:
10.1103/PhysRevLett.84.1655
PACS:
98.80.Cq, 04.62.+v, 04.65.+e
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