Conservation laws and Exact Solutions in Brans-Dicke Cosmology with a Scalar Field

Understand

Scalar-tensor theories have drawn the attention of cosmologist for the past few years because they can provide mechanism to explain the observable phenomena.

• Moreover, the results of scalar-tensor theories can be applied in higher-order theories of gravity.
• In this work, we consider a Brans-Dicke scalar field cosmological model that includes a second scalar field minimally coupled to gravity.
• For the second scalar field we consider the two cases that there exist and there is not any interaction with the Brans-Dicke scalar field.