论文标题
集体操作可以成倍增强量子状态验证
Collective Operations Can Exponentially Enhance Quantum State Verification
论文作者
论文摘要
最大纠缠状态是许多量子通信和计算任务中的关键资源，其认证是保证所需功能的关键元素。我们介绍了集体策略，以对钟形配对的有效局部验证，这些策略在测量之前使用初始信息和噪声传递到几份副本。通过这种方式，与以前（甚至最佳）在单个副本上运行的方法相比，需要测量并破坏的纠缠对数大大减少。此外，其余国家已直接认证。我们表明，我们的工具可以扩展到其他问题和较大类别的多部分状态。
Maximally entangled states are a key resource in many quantum communication and computation tasks, and their certification is a crucial element to guarantee the desired functionality. We introduce collective strategies for the efficient, local verification of ensembles of Bell pairs that make use of an initial information and noise transfer to few copies prior to their measurement. In this way the number of entangled pairs that need to be measured and hence destroyed is significantly reduced as compared to previous, even optimal, approaches that operate on individual copies. Moreover the remaining states are directly certified. We show that our tools can be extended to other problems and larger classes of multipartite states.
