论文标题
以半设备独立的方式对未知量子状态的实验纠缠定量
Experimental Entanglement Quantification for Unknown Quantum States in a Semi-Device-Independent Manner
论文作者
论文摘要
使用非分类钟形不平等的概念，我们表明，量子纠缠是各种量子信息处理任务的关键资源，可以以半脱位无关的方式对任何未知量子状态进行量化，其中量化基于实验性获得的概率分布，并且仅在量子上获得了量子的知识。具体而言，作为我们在多层次系统上的应用程序的应用，我们通过实验量化了Qutrit-Qutrit量子系统的形成纠缠和纠缠的纠缠和纠缠。此外，为了展示我们对多目标系统的方法，我们进一步量化了三量量子系统的纠缠的几何测量。我们的结果提供了一种可靠地量化多层次和多目标系统中的纠缠的一般方法，从而为通过量化涉及的纠缠来表征多体量子系统的方式铺平了道路。
Using the concept of non-degenerate Bell inequality, we show that quantum entanglement, the critical resource for various quantum information processing tasks, can be quantified for any unknown quantum states in a semi-device-independent manner, where the quantification is based on the experimentally obtained probability distribution and beforehand knowledge on quantum dimension only. Specifically, as an application of our approach on multi-level systems, we experimentally quantify the entanglement of formation and the entanglement of distillation for qutrit-qutrit quantum systems. In addition, to demonstrate our approach for multi-partite systems, we further quantify the geometry measure of entanglement of three-qubit quantum systems. Our results supply a general way to reliably quantify entanglement in multi-level and multi-partite systems, thus paving the way to characterize many-body quantum systems by quantifying involved entanglement.
