Bianchi-i cosmologies with electromagnetic and spinor fields. Isotropization problem

We consider Bianchi type I cosmologies with unidirectional magnetic and electric fields, assuming as well the existence of a global spinor field ψ(t) as one more possible source of gravity able to suppress the inevitable anisotropy accompanying a nonzero vector field. The field ψ(t) is assumed to contain a nonlinearity in the form sn, where s = ψ̄ψ and n = const (the special case n = 1 corresponds to a Dirac massive field). The structure of the stress-energy tensor of the spinor field is shown to be the same as that of a perfect fluid with the equation of state p = wρ where w = n-1. The Dirac massive spinor field and nonlinear fields with n < 4/3 are shown to be able to provide isotropization. A numerical estimate shows that this isotropization could occur early enough to be compatible with observations. © Springer Science+Business Media, LLC 2009.

Авторы
Редакторы
-
Издательство
Kluwer Academic/Plenum Publishers
Номер выпуска
8
Язык
Английский
Страницы
2214-2221
Статус
Опубликовано
Подразделение
-
Номер
-
Том
48
Год
2009
Организации
  • 1 VNIIMS, 46 Ozyornaya St., Moscow 119361, Russian Federation
  • 2 Peoples' Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow 117198, Russian Federation
Ключевые слова
Bianchi-I cosmology; Electromagnetic field; Isotropization; Spinor field
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/2914/