| Форма представления | Статьи в зарубежных журналах и сборниках |
| Год публикации | 2017 |
| Язык | английский |
|
Игнатьев Юрий Геннадиевич, автор
|
| Библиографическое описание на языке оригинала |
Yu. G. Ignat'ev. Qualitative and Numerical Analysis of a Cosmological Modely
Based on a Classical Massive Scalar Field // Gravitation and Cosmology, 2017, Vol. 23, No. 2, pp. 131–141.
DOI: 10.1134/S0202289317020049
|
| Аннотация |
On the basis of a qualitative analysis of the set of differential equations of the standard
cosmological model it is shown that in the case of zero cosmological constant Λ this set has a stable center corresponding to zero values of the potential and its derivative at infinity. Thus the model based on a single massive classical scalar field would give a flat Universe in the infinite future. A numerical simulation of the dynamic system corresponding to the set of Einstein-Klein-Gordon equations has shown that at latetimes of the evolution the invariant cosmological acceleration has an oscillating nature and changes from −2 (braking), to +1 (acceleration). The average value of the cosmological acceleration is negative and is equal to −1/2. Oscillations of the cosmological acceleration happen in the background of a rapidly falling Hubble parameter. In the case of a nonzero value of Λ, depending on its value, three various qualitative
behavior types of the dynamic system on the 2D plane |
| Ключевые слова |
gravitation, cosmology, standart cosmological model, quality theory of differential equations, jscillation of cosmology accseleration |
| Название журнала |
GRAVITATION & COSMOLOGY
|
| Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на эту карточку |
https://repository.kpfu.ru/?p_id=155977 |
Полная запись метаданных  |
| Поле DC |
Значение |
Язык |
| dc.contributor.author |
Игнатьев Юрий Геннадиевич |
ru_RU |
| dc.date.accessioned |
2017-01-01T00:00:00Z |
ru_RU |
| dc.date.available |
2017-01-01T00:00:00Z |
ru_RU |
| dc.date.issued |
2017 |
ru_RU |
| dc.identifier.citation |
Yu. G. Ignat'ev. Qualitative and Numerical Analysis of a Cosmological Modely
Based on a Classical Massive Scalar Field // Gravitation and Cosmology, 2017, Vol. 23, No. 2, pp. 131–141.
DOI: 10.1134/S0202289317020049
|
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/?p_id=155977 |
ru_RU |
| dc.description.abstract |
GRAVITATION & COSMOLOGY |
ru_RU |
| dc.description.abstract |
On the basis of a qualitative analysis of the set of differential equations of the standard
cosmological model it is shown that in the case of zero cosmological constant Λ this set has a stable center corresponding to zero values of the potential and its derivative at infinity. Thus the model based on a single massive classical scalar field would give a flat Universe in the infinite future. A numerical simulation of the dynamic system corresponding to the set of Einstein-Klein-Gordon equations has shown that at latetimes of the evolution the invariant cosmological acceleration has an oscillating nature and changes from −2 (braking), to +1 (acceleration). The average value of the cosmological acceleration is negative and is equal to −1/2. Oscillations of the cosmological acceleration happen in the background of a rapidly falling Hubble parameter. In the case of a nonzero value of Λ, depending on its value, three various qualitative
behavior types of the dynamic system on the 2D plane |
ru_RU |
| dc.language.iso |
ru |
ru_RU |
| dc.subject |
gravitation |
ru_RU |
| dc.subject |
cosmology |
ru_RU |
| dc.subject |
standart cosmological model |
ru_RU |
| dc.subject |
quality theory of differential equations |
ru_RU |
| dc.subject |
jscillation of cosmology accseleration |
ru_RU |
| dc.title |
Yu. G. Ignat'ev. Qualitative and Numerical Analysis of a Cosmological Modely
Based on a Classical Massive Scalar Field // Gravitation and Cosmology, 2017, Vol. 23, No. 2, pp. 131–141. |
ru_RU |
| dc.type |
Статьи в зарубежных журналах и сборниках |
ru_RU |
|
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