We introduce a natural mathematical definition of boundary states of a bulk gapped ground state, in the operator algebraic framework of 2-d quantum spin systems. With approximate Haag duality at the boundary, we derive a C_-tensor category M out of such boundary state. Under a non-triviality condition of the braiding in the bulk, we show that the Drinfeld center (with an asymptotic constraint) of M is equivalent to the bulk braided C_-tensor category.
De Alexander Müller-Hermes
De Mari Carmen Banuls
De Yoshiko Ogata
De Stanislaw Szarek
De Sarah Timhadjelt
De Sylvain Carrozza
De Roberta Anna Iseppi
De Giulia Gubitosi
