A. Carollo et al., Linear optical implementation of nonlocal product states and their indistinguishability - art. no. 022318, PHYS REV A, 6402(2), 2001, pp. 2318
In a recent paper, Bennett et al. [Phys. Rev. A 59, 1070 (1999)] have shown
the existence of a basis of product states of a bipartite system with mani
fest nonlocal properties. In particular these states cannot be completely d
iscriminated by means of bilocal measurements. In this paper we propose an
optical realization of these states and we will show that they cannot be co
mpletely discriminate by means of a global measurement using only optical l
inear elements, conditional transformation, and auxiliary photons.