Esdeveniments

Seminaris

ICCUB SEMINAR. Fergus Simpson: “Dark energy from a frozen scalar field”

ICCUB SEMINAR. Fergus Simpson: “Dark energy from a frozen scalar field”
Start
12-14-2016
End
12-14-2016
El pròxim dimecres 14 de desembre a les 12, l’Aula Pere Pasqual de la Facultat de Física de la Universitat de Barcelona acull el seminari “Dark energy from a frozen scalar field” a càrrec de Fergus Simpson de l’Institut de Ciències del Cosmos (IEEC-UB)

ABSTRACT

Ordinarily, a scalar field may only play the role of dark energy if it possesses a potential that is either extraordinarily flat or extremely fine-tuned. I shall demonstrate that these restrictions need not apply if the scalar field exchanges energy with another fluid. In this scenario, the field may come to rest while displaced from the local minimum of its potential. As a result, any scalar field is capable of forming dark energy, regardless of the shape of its potential. I will present a physically motivated realisation in the form of a derivative neutrino-majoron coupling.