Speaker
Siyao Li
Description
Oscillons are long-lived localized solitons of a real scalar field with potential flatter than quadratic. They are considered to be formed through parametric resonance during preheating after inflation and can play an important role in the early universe because of their long lifetime. However, their lifetime can be greatly affected by the parametric resonance if there is coupling of the inflaton field to other fields. We consider an oscillon coupled with another real scalar field and use both semi-analytical method and numerical simulation to investigate the evolution and lifetime of the oscillon. We find that the oscillon life time can be greatly shortened depending on the coupling strength.
Authors
Mr
Gen Sekita
(Tokyo Institute of Technology)
Masahide Yamaguchi
(Institute for Basic Science/ Institute of Science Tokyo)
Siyao Li
Dr
Yingli Zhang
(Tongji University)
