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- Title
Hilltop Inflation and Generation of Helical Magnetic Field.
- Authors
Chakraborty, Sumanta; Pal, Supratik; SenGupta, Soumitra
- Abstract
Primordial magnetic field generated in the inflationary era can act as a viable source for the present day intergalactic magnetic field of sufficient strength. We present a fundamental origin for such a primordial generation of the magnetic field, namely through anomaly cancellation of U (1) gauge field in quantum electrodynamics in the context of hilltop inflation. We have analysed at length the power spectrum of the magnetic field, thus generated, which turns out to be helical in nature. We have also found that magnetic power spectrum has significant scale-dependence giving rise to a non-trivial magnetic spectral index, a key feature of this model. Interestingly, there exists a large parameter space, where magnetic field of significant strength can be produced.
- Subjects
INFLATIONARY universe; MAGNETIC fields; QUANTUM electrodynamics; GAUGE field theory; FIELD theory (Physics)
- Publication
Universe (2218-1997), 2022, Vol 8, Issue 1, p26
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe8010026