Thermodynamics of $f(R)$ Gravity with Disformal Transformation

Chao-Qiang Geng, Wei-Cheng Hsu, Jhih-Rong Lu +1

We study thermodynamics in $f(R)$ gravity with the disformal transformation. The transformation applied to the matter Lagrangian has the form of $\g_{\m\n} = A(ϕ,X)g_{\m\n} + B(ϕ,X…