2011/09/29 by Yu-Chung Chen, Chen, Yu-Chung
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Solar and Space Plasma Dynamics #gr-qc #hep-th
paper · pdf · doi:10.48550/arxiv.1109.6612
23 pages, 2 figures
openalex publication_date 2011/09/29 · arxiv created 2012/03/06 · arxiv updated 2012/03/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recently, we have performed research on the subject of the cosmological constant problem. The scenario is based on two postulates for inflationary theory: one is that inflaton ϕ can interact with radiation (relativistic particles); the other is that radiation will be created continuously during and after the epoch of inflation. According to these postulates and from a "macroscopic perspective", we discover that radiation can be viewed as a product of the interaction between ϕ and some "effective kinetic frictional force" that exists in inflaton dynamics. Deducing and surmising from "effective friction", we obtain conclusions of two special types of expanding universe: A Type I universe will finally enter an expanding course after a special time t* with uniformly rolling ϕ(t*) due to the balance between V'(ϕ(t)), 3H(t)ϕ(t*) and the "effective kinetic frictional force". In this result, the expanding course will see particles created continuously. Additionally, for a Type II universe, ϕ will be at rest after tr inside a region named the "stagnant zone" that is formed by the "maximum effective static frictional force". Consistent with this, inflaton potential will survive as a relic V(ϕ(tr)), playing the role of the effective cosmological constant Λ .