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Accelerated expansion of the Universe purely driven by scalar field fluctuations

Daniel Jiménez-Aguilar*

  • Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155, USA

  • *Contact author: Daniel.Jimenez_Aguilar@tufts.edu
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Phys. Rev. D 114, 023513 – Published 6 July, 2026

DOI: https://doi.org/10.1103/4zn2-bh68

Abstract

We show that scalar field fluctuations alone can drive cosmic acceleration, provided the Universe is spatially closed and the Compton wavelength of the field exceeds the radius of curvature. This mechanism may open new perspectives on inflation and dark energy, which could arise from a gas of sufficiently light bosons in a closed universe.

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Phys. Rev. D 114, 023513– Published 6 July, 2026
  • Received 24 February 2026
  • Accepted 8 June 2026
Article part of CHORUS
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