%0 Journal Article %T On Enriching the Levin-Wen model with Symmetry %A Liang Chang %A Meng Cheng %A Shawn X. Cui %A Yuting Hu %A Wei Jin %A Ramis Movassagh %A Pieter Naaijkens %A Zhenghan Wang %A Amanda Young %J Mathematics %D 2014 %I arXiv %R 10.1088/1751-8113/48/12/12FT01 %X Symmetry protected and symmetry enriched topological phases of matter are of great interest in condensed matter physics due to new materials such as topological insulators. The Levin-Wen model for spin/boson systems is an important rigorously solvable model for studying $2D$ topological phases. The input data for the Levin-Wen model is a unitary fusion category, but the same model also works for unitary multi-fusion categories. In this paper, we provide the details for this extension of the Levin-Wen model, and show that the extended Levin-Wen model is a natural playground for the theoretical study of symmetry protected and symmetry enriched topological phases of matter. %U http://arxiv.org/abs/1412.6589v1