Dynamics of Viscous Phantom Universe

The phantom dark energy remarkably boosts our prehension of the accerlerating Universe. In the phantom Universe without bulk viscosity, the models are warmly discussed. In order to generalize the model, we should study it further by considering viscous fluid in the Universe. In this paper, we investigate a class of phantom dark energy models with bulk viscosity by the method of dynamical analysis technique. We show that there are different cosmic late-time behavior and the stability also brings some constraints on the models. We also show that the viscous phantom Universe admit the tracking attractor solution. We find that the viscosity play an important role in the evolution of Universe, the viscosity is big enough, the late time transition from matter dominated to phantom dominated would be different from that of the phantom Universe without viscosity.