Gravitational Gauge Interactions of Dirac Field

Gravitational interactions of Dirac field arestudied in this paper. Based on gauge principle, quantum gaugetheory of gravity, which is perturbatively renormalizable, isformulated in the Minkowski space-time. In quantum gauge theory ofgravity, gravity is treated as a kind of fundamental interactions,which is transmitted by gravitational gauge field, and Dirac fieldcouples to gravitational field through gravitational gaugecovariant derivative. Based on this theory, we can easily explaingravitational phase effect, which has already been detected by COWexperiment.