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Inflation from fermionic matter interacting with a gauge field
2014-11-20     Text Size:  A

Institute of Theoretical Physics

Chinese Academy of Sciences

State Key Laboratory of Theoretical Physics

Seminar

 

Title

题目

Inflation from fermionic matter interacting with a gauge field
 

Speaker

报告人

Prof.Antonino Marciano
 

Affiliation

所在单位

Fudan University
 

Date

日期

2014年11月20日(星期四) 10:00
 

Venue

地点

ITP new building 6420

Abstract

摘要

I present results from works in collaboration with S. Alexander, A. Kosowsky and D. Spergel, in which a model of Inflation has been developed relying on a U(1) gauge field and on standard fermionic matter. The model is based on the interaction between a homogeneous and isotropic configuration of the U(1) gauge field and the fermionic charge density. The regulated fermionic charge density is found to redshift as the inverse of the gravitational scale factor. The time-like component of the gauge field is sourced by the fermionic charge, leading to a growth in the gauge field proportional to the scale factor. Consistency of the model is ensured via the Stueckelberg mechanism. There exists exactly one stable solution, the stability of which can be demonstrated numerically. Inflation arises then without fine tuning, and does not require postulating any effective potential or non-standard coupling.
 

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