TY - JOUR AU - Cuevas, Gemma de las AU - Schuch, Norbert AU - Pérez García, David AU - Cirac, J.I. PY - 2013 DO - 10.1088/1367-2630/15/12/123021 SN - 1367-2630 UR - https://hdl.handle.net/20.500.14352/33484 T2 - New journal of physics AB - We analyze the description of quantum many-body mixed states using matrix product states and operators. We consider two such descriptions: (i) as a matrix product density operator of bond dimension D; and (ii) as a purification that is written as a... LA - eng PB - IOP Publishing KW - Factorizations TI - Purifications of multipartite states: limitations and constructive methods TY - journal article VL - 15 ER -