Here, cosmology is obtained from the variable gravitational constant G ∝ φ with φ(x) being a scalar and its fluctuations around the ground state. The gravitational action contains Einstein-Hilbert like term with variable G, kinetic energy and self-interaction potential for φ(x). Two phase transitions take place in this model. The first one takes place at the GUT (grand unified theory) scale ∼ 2...
