Open AccessInflation model with viscous fluid
Author(s) -
Shynaray Myrzakul,
Pyotr Tsyba,
Olga Razina,
Yerlan Myrzakulov
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1730/1/012136
Subject(s) - inflation (cosmology) , scale factor (cosmology) , physics , viscous liquid , scalar field , viscosity , volume viscosity , cosmological model , universe , function (biology) , mathematical physics , theoretical physics , metric expansion of space , classical mechanics , cosmology , mechanics , thermodynamics , dark energy , quantum mechanics , evolutionary biology , biology
We investigated f ( R ) gravity with k -essence using the Starobinsky model as an example, given by the expression f ( R ) = R + α R 2 . Using the hybrid function of the scale factor, we found the scalar field function and its potential. For the model under consideration, the parameters of the slow roll-off satisfy the inflationary stage. Our model allows us to obtain an accelerated expansion of the Universe during an inflationary period. A non-uniform non-viscous fluid was investigated, and then the viscosity was introduced in the second example. Received fluid equations for the accelerated universe.