Jm. Aguirregabiria et al., EXPONENTIAL-POTENTIAL SCALAR FIELD UNIVERSES .1. BIANCHI TYPE-I MODELS, Physical review. D. Particles and fields, 48(10), 1993, pp. 4662-4668
We obtain a general exact solution of the Einstein field equations for
the anisotropic Bianchi type I universes filled with an exponential-p
otential scalar field and study their dynamics. It is shown, in agreem
ent with previous studies, that for a wide range of initial conditions
the late-time behavior of the models is that of a power-law inflating
Friedmann-Robertson-Walker (FRW) universe. This property does not hol
d, in contrast, when some degree of inhomogeneity is introduced, as di
scussed in our following paper.