Dür W
Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria.
Phys Rev Lett. 2001 Dec 3;87(23):230402. doi: 10.1103/PhysRevLett.87.230402. Epub 2001 Nov 13.
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.
我们研究了多体量子态的可提纯性与贝尔不等式违背之间的关系。我们证明存在违背多体贝尔不等式的多体束缚纠缠态（即不可分离、不可提纯的态）。这意味着：（i）违背贝尔不等式不是可提纯性的充分条件；（ii）一些束缚纠缠态不能用局域隐变量模型来描述。
