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  • Letter
  • Open Access

How to obtain slow roll inflation driven by nonlinear electrodynamics

Daniele Malafarina1,*, Hrishikesh Chakrabarty1,†, and Ilia Musco2,3,‡

  • *Contact author: daniele.malafarina@nu.edu.kz
  • †Contact author: hrishikesh.chakrabarty@nu.edu.kz
  • ‡Contact author: ilia.musco@ung.si
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Phys. Rev. D 112, L121304 – Published 30 December, 2025

DOI: https://doi.org/10.1103/3rvf-8t9z

Abstract

We establish for the first time the conditions that must be imposed on the action for a magnetic universe in a theory of nonlinear electrodynamics in order to have an asymptotically de Sitter initial state followed by a slow roll inflationary phase. We show that models so far proposed in the literature do not allow for a prolonged inflationary phase consistent with observations. We construct a Lagrangian that reduces to the Maxwell one in weak field; this is the only class of models that satisfies the required conditions for slow roll in the early Universe.

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Phys. Rev. D 112, L121304– Published 30 December, 2025
  • Received 5 April 2025
  • Accepted 24 November 2025
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