Adiabatic regularization and particle creation for spin one-half fields

Abstract

The extension of the adiabatic regularization method to spin-$1/2$ fields requires a self-consistent adiabatic expansion of the field modes. We provide here the details of such expansion, which differs from the WKB ansatz that works well for scalars, to firmly establish the generalization of the adiabatic renormalization scheme to spin-$1/2$ fields. We focus on the computation of particle production in de Sitter spacetime and obtain an analytic expression of the renormalized stress-energy tensor for Dirac fermions.

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References in corpus (4)

• The Creation of Particles in an Expanding Universe
• Amplitude of Perturbations from Inflation
• Effects of Quantized Scalar Fields in Cosmological Spacetimes with Big Rip Singularities
• Study of the preheating phase of chaotic inflation

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