¼­¿ï´ë ÀÛ¿ë¼Ò ¼¼¹Ì³ª 2013 Feb 4: Lin Chen(University of Waterloo and National University of Singapore); Separability problem for multipartite states of rank at most four 2013 Feb 4: Lin Chen(University of Waterloo and National University of Singapore); Length of separable states and symmetrical informationally complete POVM