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開始行:
Alexei A. Starobinsky
Title:
Problems with constructing complete cosmological models i...
gravity and their resolution
Abstract:
f(R) gravity, where R is the scalar curvature, is a pheno...
macroscopic way to describe both types of dark energy whi...
appeared during the Universe evolution: primordial dark e...
driving inflation in the early Universe and present dark ...
which has much smaller effective energy density. In the c...
inflation, the simplest R+R2 model proposed already in 19...
internally consistent, has a graceful exit to the radiati...
FRW stage via the period of reheating in which all matter...
Universe arises as a result of gravitational particle cre...
remains in agreement with the most recent observational d...
this form of f(R) may be justified by a number of microsc...
It is possible to construct models describing the present...
in f(R) gravity which satisfy all present observational t...
these models require a much more complicated form of f(R)...
low energy scale, so we don't have any reasonable microsc...
justification of them at present. More critical is that t...
generically cannot reproduce the correct evolution of the...
the past due to formation of additional weak singularitie...
problems. Thus, to construct complete cosmological models...
dark energy not destroying all previous achievements of t...
Universe cosmology including the recombination, the corre...
inflation of any kind, one has to change the behaviour of...
large positive R and to extend f(R) to the region of nega...
shall describe correct ways to do it. Combined descriptio...
primordial and present dark energy using one f(R) functio...
too, but it leads to completely different reheating after...
during which strongly non-linear oscillations of R occur.
終了行:
Alexei A. Starobinsky
Title:
Problems with constructing complete cosmological models i...
gravity and their resolution
Abstract:
f(R) gravity, where R is the scalar curvature, is a pheno...
macroscopic way to describe both types of dark energy whi...
appeared during the Universe evolution: primordial dark e...
driving inflation in the early Universe and present dark ...
which has much smaller effective energy density. In the c...
inflation, the simplest R+R2 model proposed already in 19...
internally consistent, has a graceful exit to the radiati...
FRW stage via the period of reheating in which all matter...
Universe arises as a result of gravitational particle cre...
remains in agreement with the most recent observational d...
this form of f(R) may be justified by a number of microsc...
It is possible to construct models describing the present...
in f(R) gravity which satisfy all present observational t...
these models require a much more complicated form of f(R)...
low energy scale, so we don't have any reasonable microsc...
justification of them at present. More critical is that t...
generically cannot reproduce the correct evolution of the...
the past due to formation of additional weak singularitie...
problems. Thus, to construct complete cosmological models...
dark energy not destroying all previous achievements of t...
Universe cosmology including the recombination, the corre...
inflation of any kind, one has to change the behaviour of...
large positive R and to extend f(R) to the region of nega...
shall describe correct ways to do it. Combined descriptio...
primordial and present dark energy using one f(R) functio...
too, but it leads to completely different reheating after...
during which strongly non-linear oscillations of R occur.
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