Cosmological model due to dimensional reduction of higher-dimensional massive gravity theory

Understand

We investigate a cosmological model resulting from a dimensional reduction of the higher-dimensional dRGT massive gravity.

• By using the Kaluza-Klein dimensional reduction, we obtain an effective four-dimensional massive gravity theory with a scalar field.
• It is found that the resulting theory corresponds to a combined description of mass-varying massive gravity and quasi-dilaton massive gravity.
• By analyzing the cosmological solution, we found that it is possible to obtain the late-time expansion of the universe due to the graviton mass.