KFU. Card publication. 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

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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&NDASH;141.

Form of presentation

Articles in international journals and collections

Year of publication

2017

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Authors, employees of KFU

Ignatev Yuriy Gennadievich, author

Bibliographic description in the original language

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

Annotation

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

Keywords

gravitation, cosmology, standart cosmological model, quality theory of differential equations, jscillation of cosmology accseleration

The name of the journal

GRAVITATION & COSMOLOGY

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=155977&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ignatev Yuriy Gennadievich	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/eng/?p_id=155977&p_lang=2	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	Articles in international journals and collections	ru_RU