Comment on "Creation of spin 1/2 particles by an electric field in de Sitter space"

TL;DR

This paper corrects previous calculations of fermion creation by an electric field in (1+1)D de Sitter space, clarifying the relationship between positive and negative energy solutions through charge conjugation.

Contribution

It provides a correction to earlier results on fermion density numbers and elucidates the connection between energy solutions via charge conjugation in de Sitter space.

Findings

Corrected fermion creation density numbers

Clarified the relation between positive and negative energy solutions

Highlighted the role of charge conjugation in fermion solutions

Abstract

The main objective of this comment is to correct the density number of created fermions by an electric field in the (1+1) dimensional de-Sitter space-time communicated by V. M. Villalba in Phys. Rev. D 52, 3742 (1995). It is shown how the positive and negative energy solutions are connected to one another by the charge conjugation. Some concluding remarks are made.