| Автор | Yang Rong-Jia |
| Автор | Zhang Shuang-Nan |
| Дата выпуска | 2008-01-01 |
| dc.description | Purely kinetic k-essence models in which the Lagrangian contains only a kinetic factor and does not depend explicitly on the field itself are considered, and a theoretical constraint is obtained: F<sub>x</sub> = F<sub>0</sub>a<sup>−3</sup>. Under this theoretical constraint, we discuss a kind of purely k-essence with form F(X) = -(1 + 2X<sup>n</sup>)<sup>1/2n</sup>, which can be considered as the generalized tachyon field, and find that this kind of k-essence is not likely a candidate of dark energy to describe the present accelerated expansion of the Universe. This is contrary to a previous suggestion that k-essence with such a form may be used to describe phantom cosmologies. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2008 Chinese Physical Society and IOP Publishing Ltd |
| Название | Theoretical Constraint on Purely Kinetic k-Essence |
| Тип | paper |
| DOI | 10.1088/0256-307X/25/1/092 |
| Electronic ISSN | 1741-3540 |
| Print ISSN | 0256-307X |
| Журнал | Chinese Physics Letters |
| Том | 25 |
| Первая страница | 344 |
| Последняя страница | 346 |
| Выпуск | 1 |
