On Number of Nflation Fields

Abstract

We study the Nflation model, in which a collection of massive scalar fields drive the inflation simultaneously. We find, when the number of fields is larger than the square of ratio of the Planck scale $M_p$ to the average value $\bar{m}$ of fields masses, the slow roll inflation region will disappear. This suggests that in order to make 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.

13 pages, 3 figures;added more comments,to publish in JCAP

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Cited by in corpus (10)

• Gauge Fields and Inflation
• Inflation with multiple sound speeds: a model of multiple DBI type actions and non-Gaussianities
• Cosmology With Many Light Scalar Fields: Stochastic Inflation and Loop Corrections
• N-flation from multiple DBI type actions
• Gauged M-flation, its UV sensitivity and Spectator Species
• Dark Matter via Many Copies of the Standard Model
• Gauged M-flation After BICEP2
• The Large Number Limit of Multifield Inflation
• Phase Diagram for Nflation
• M-flation and its spectators