Multipartite bound entangled states that violate Bell's inequality.
We study the relation between distillability of multipartite states and violation of Bell's inequality. We prove that there exist multipartite bound entangled states (i.e., nonseparable, nondistillable states) that violate a multipartite Bell inequality. This implies that (i) violation of Bell's inequality is not a sufficient condition for distillability and (ii) some bound entangled states cannot be described by a local hidden variable model.
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Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria.