Regular Article - Theoretical Physics
Rest frame vacuum of the Proca field in the de Sitter expanding universe
West University of Timişoara, V. Pârvan Ave. 4, 300223, Timisoara, Romania
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Accepted: 2 June 2020
Published online: 15 June 2020
The general plane wave solutions of the Proca field in conformal charts of the de Sitter expanding universe are derived for arbitrary polarizations showing how the frequencies can be separated in rest frames, defining thus the rest frame vacuum of this field.
© The Author(s), 2020