On the number of Nflation fields

2008/01/31 by Iftikhar Ahmad, Yun-Song Piao, Cong-Feng Qiao · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-th

paper · pdf · doi:10.1088/1475-7516/2008/06/023

published as JCAP0806:023,2008 · 13 pages, 3 figures;added more comments,to publish in JCAP

arxiv created 2008/06/04 · openalex publication_date 2008/06/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

In this paper, we study the Nflation model, in which a collection of massive scalar fields drive the inflation, simultaneously. We observe that when the number of fields is larger than the square of the ratio of the Planck scale M p to the average value of field masses, the slow roll inflation region will disappear. This suggests that in order to have Nflation responsible for our observable universe, the number of fields driving the Nflation must be bounded by the above ratio. This result is also consistent with recent arguments from black hole physics.

Cited by

• N-flation from multiple DBI type actions
• Large number limit of multifield inflation
• Inflation with multiple sound speeds: A model of multiple DBI type actions and non-Gaussianities

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