Playing this video requires the latest flash player from Adobe.
Download link (right click and 'save-as') for playing in VLC or other compatible player.
We present a set of models which realize interacting topological phases. The models are constructed in 2 dimensions for a system with U(1)xU(1) symmetry. We demonstrate that the models are topological by measuring their Hall conductivity, and demonstrating that they have gapless edge modes. We have also studied the models numerically.