Topological Entanglement Entropy in Chern-Simons Theories and Quantum   Hall Fluids
  We compute directly the entanglement entropy of spatial regions in Chern-Simons gauge theories in 2+1 dimensions using surgery. We use these results to determine the universal topological piece of the entanglement entropy for Abelian and non-Abelian quantum Hall fluids. 
Shiying Dong, Eduardo Fradkin, Robert G. Leigh, Sean Nowling