2000/12/31 by Anupam Mazumdar, M. M. Sheikh-Jabbari, Mohammad M. Sheikh-Jabbari · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevlett.87.011301
published as Phys.Rev.Lett.87:011301,2001 · Revtex, 4 pages, v3: very minor changes, the version to appear in PRL
arxiv created 2001/04/27 · openalex publication_date 2001/06/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we show that noncommutativity in spatial coordinates can generate magnetic field in the early Universe on a horizon scale. The strength of such a magnetic field depends on the number density of massive charged particles present at a given moment. This allows us to trace back the temperature dependence of the noncommutativity scale from the bounds on primordial magnetic field coming from nucleosynthesis.