Linear optical implementation of nonlocal product states and their indistinguishability - art. no. 022318

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.