Non-existence of natural states for Abelian Chern-Simons theory
  
  
  
      
    Claudio Dappiaggi, Simone Murro, Alexander Schenkel
  
  
  
  
  
  
                
    
  December 13, 2016  
  
  We give an elementary proof that Abelian Chern-Simons theory, described as a
functor from oriented surfaces to C*-algebras, does not admit a natural state.
Non-existence of natural states is thus not only a phenomenon of quantum field
theories on Lorentzian manifolds, but also of topological quantum field
theories formulated in the algebraic approach.
  
  
    
  
  Keywords: 
locally covariant quantum field theory, Chern-Simons theory, natural states