TY - JOUR
T1 - Cosmology with variable G and nonlinear electrodynamics
AU - Joseph, Gabriel W.
AU - OVGUN, ALI
N1 - Publisher Copyright:
© 2021, Indian Association for the Cultivation of Science.
PY - 2021
Y1 - 2021
N2 - In a bid to resolve lingering problems in cosmology, more focus is being tilted towards cosmological models in which physical constants of nature are not necessarily real constants but vary with cosmic time. In this paper, we study a cosmological model in nonlinear electrodynamics with Newton’s gravitational constant G, which is not a constant but varies in terms of a power law of the scale factor of the universe. Hence, the evolution of the scale factor a(t) is studied in this model, which depends on a fine-tuning term of nonlinear electrodynamics, α. Finally, we verify the stability of the model using the speed of sound.
AB - In a bid to resolve lingering problems in cosmology, more focus is being tilted towards cosmological models in which physical constants of nature are not necessarily real constants but vary with cosmic time. In this paper, we study a cosmological model in nonlinear electrodynamics with Newton’s gravitational constant G, which is not a constant but varies in terms of a power law of the scale factor of the universe. Hence, the evolution of the scale factor a(t) is studied in this model, which depends on a fine-tuning term of nonlinear electrodynamics, α. Finally, we verify the stability of the model using the speed of sound.
KW - Acceleration of the universe
KW - Causality
KW - Classical stability
KW - Cosmology
KW - Inflation
KW - Nonlinear electrodynamics
KW - Variable G
UR - http://www.scopus.com/inward/record.url?scp=85104974533&partnerID=8YFLogxK
U2 - 10.1007/s12648-021-02110-4
DO - 10.1007/s12648-021-02110-4
M3 - Article
AN - SCOPUS:85104974533
JO - Indian Journal of Physics
JF - Indian Journal of Physics
SN - 0973-1458
ER -