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Efficient Device-Independent Entanglement Detection for Multipartite Systems

机译:用于多档系统的高效无关的纠缠检测

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Entanglement is one of the most studied properties of quantum mechanics for its application in quantum information protocols. Nevertheless, detecting the presence of entanglement in large multipartite states continues to be a great challenge both from the theoretical and the experimental point of view. Most of the known methods either have computational costs that scale inefficiently with the number of particles or require more information on the state than what is attainable in everyday experiments. We introduce a new technique for entanglement detection that provides several important advantages in these respects. First, it scales efficiently with the number of particles, thus allowing for application to systems composed by up to few tens of particles. Second, it needs only the knowledge of a subset of all possible measurements on the state, therefore being apt for experimental implementation. Moreover, since it is based on the detection of nonlocality, our method is device independent. We report several examples of its implementation for well-known multipartite states, showing that the introduced technique has a promising range of applications.
机译:纠缠是其在量子信息协议中应用的量子力学的最多属性之一。然而,检测大型多分体状态中的缠结的存在仍然是从理论和实验的观点来成为一个巨大的挑战。大多数已知方法具有计算成本,其与粒子数量效率低,或者需要更多关于状态的信息,而不是日常实验中可实现的信息。我们介绍了一种用于纠缠检测的新技术,可在这些方面提供几个重要的优势。首先,它用粒子的数量有效地缩放,从而允许应用于由多达几十颗粒组成的系统。其次,它只需要对状态所有可能测量的子集的知识,因此适用于实验实施。此外,由于它基于非光度检测,因此我们的方法是独立的设备。我们举报了若干知名多分体国家实施的几个例子,表明介绍技术具有有希望的应用范围。

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