20.500.12556/DiRROS-29971 Classical constant electric fields and the Schwinger effect in de Sitter We study constant classical electric fields and the Schwinger effect in de Sitter space, with potential implications for magnetogenesis and inflationary dark matter production. Treating the photon as a dynamical field, we show that sustaining a constant electric field in de Sitter requires a tachyonic photon mass of order the Hubble scale. This observation has physical implications, as it alters the infrared behaviour of the induced Schwinger current. Using an on-shell renormalization condition consistent with a tachyonic photon, we recompute the current for charged fermions and scalars, finding it to be finite and positive even in the massless limit of the charge carriers, contrary to earlier results in the literature predicting a puzzling negative IR divergence. For scalars, we include a non-minimal coupling to the Ricci curvature, enabling us to analyze the conformal limit, where the current closely matches that of charged fermions. Schwinger effect de Sitter space magnetogenesis Schwingerjev pojav true false true IOP Publishing Ltd on behalf of Sissa Medialab Angleški jezik Slovenski jezik © 2026 The Author(s). Neznano 2026-06-10 14:19:54 2026-06-10 14:19:54 2026-06-11 03:47:37 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 10. 6. 2026; str. 1-36 iss. 4, [article no.] 040 Vol. 2026 Apr. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-11-13 2026-02-17 2026-04-14 53 1475-7516 10.1088/1475-7516/2026/04/040 281118211 https://iopscience.iop.org/article/10.1088/1475-7516/2026/04/040 1 b36fd383-64c6-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45148 RAZ_Bastero-Gil_Mar_2026.pdf RAZ_Bastero-Gil_Mar_2026.pdf 1 5175528974B12BB96DE21D5AF81202AF 56481dba608269b5ecaf4360fafc506523e7cbc49866cd8aa2f99110f6df690e 5871904d-64c7-11f1-9215-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=45149 Institut Jožef Stefan 0 0 0