Fab Four: When John and George Play Gravitation and Cosmology

Figure 8

Evolution of 𝑞, 𝑤_𝜑, 𝑄_𝜑, and 𝑐²_𝜑 with the scale factor. We observe the same transition from inflation to stiff matter for the scalar field. Initial conditions are 𝜑̇_𝑖=100 and 𝜑_𝑖=1.