论文标题
光子量子开关中不确定因果秩序的半设备独立认证
Semi-device-independent certification of indefinite causal order in a photonic quantum switch
论文作者
论文摘要
我们报告了无限期因果秩序的实验认证，仅依赖于单一一方的运营表征。我们在半设备独立的方案中这样做，而当事方的本地操作的表征最少的假设可以通过量子开关来证明不确定的因果秩序。为了实现这一结果，我们介绍了独立于半设备的因果不平等的概念，并表明在光子量子开关中产生的相关性，其中所有当事方都能收集局部结果统计，从而违反了这种不平等的224个标准偏差。该结果由无限期因果秩序的实验证明组成，迄今为止，设备特征的假设最少。
We report an experimental certification of indefinite causal order that relies only on the characterization of the operations of a single party. We do so in the semi-device-independent scenario with the fewest possible assumptions of characterization of the parties' local operations in which indefinite causal order can be demonstrated with the quantum switch. To achieve this result, we introduce the concept of semi-device-independent causal inequalities and show that the correlations generated in a photonic quantum switch, in which all parties are able to collect local outcome statistics, achieve a violation of this inequality of 224 standard deviations. This result consists of the experimental demonstration of indefinite causal order with the fewest device-characterization assumptions to date.
