Cosmological Model Based on Gauge Theory of Gravity

A cosmological model based on gauge theory of gravity is proposed in this paper. Combining cosmologicalprinciple and field equation of gravitational gauge field, dynamical equations of the scale factor R(t) of our universe canbe obtained. This set of equations has three different solutions. A prediction of the present model is that, if the energydensity of the universe is not zero and the universe is expanding, the universe must be space-flat, the total energy densitymust be the critical density pof the universe. For space-flat cease, this model gives the same solution as that of theFriedmann model. In other words, though they have different dynamics of gravitational interactions, general relativityand gauge theory of gravity give the same cosmological model.