Title: Cosmological perturbations from an inhomogeneous phase transition
Abstract: A mechanism for generating metric perturbations in inflationary models is considered. Long-wavelength inhomogeneities of light scalar fields in a decoupled sector may give rise to superhorizon fluctuations of couplings and masses in the low-energy effective action. Cosmological phase transitions may then occur that are not simultaneous in space, but occur with time lags in different Hubble patches that arise from the long-wavelength inhomogeneities. Here an interesting model in which cosmological perturbations may be created at the electroweak phase transition is considered. The results show that phase transitions may be a generic source of non-Gaussianity.
Publication Year: 2009
Publication Date: 2009-06-26
Language: en
Type: article
Indexed In: ['crossref', 'datacite']
Access and Citation
Cited By Count: 25
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot