3 papers
gr-qc2025
Modified gravity as entropic cosmology
Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul +1
The present work reveals a direct correspondence between modified theories of gravity (cosmology) and entropic cosmology based on the thermodynamics of apparent horizon. It turns o…
gr-qc2025
Natural validation of the second law of thermodynamics in cosmology
Sergei D. Odintsov, Tanmoy Paul, Soumitra SenGupta
The present work shows that the second law of thermodynamics gets naturally satisfied during the entire cosmic evolution of the universe starting from inflation to the late dark en…
hep-th2024
Does the stability of f(R) theories imply the stability of the dual scalar-tensor theory ?
Subham Chakraborty, Soumitra SenGupta
Higher curvature f(R) gravity theories are often plagued with Ostragadsky instability. In this work we show that such instability manifests itself in the corresponding dual scalar…