Verification of high-dimensional entanglement generated in quantum interference
Verification of high-dimensional entanglement generated in quantum interference
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DOI：
10.1103/physreva.101.032302
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发表时间：
2019-10
影响因子：
2.9
通讯作者：
Yuanyuan Chen;S. Ecker;J. Bavaresco;T. Scheidl;Lixiang Chen;F. Steinlechner;M. Huber;R. Ursin
中科院分区：
文献类型：
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作者：
Yuanyuan Chen;S. Ecker;J. Bavaresco;T. Scheidl;Lixiang Chen;F. Steinlechner;M. Huber;R. Ursin
纠缠和量子干涉是各种量子信息处理任务中的关键成分。利用高维态空间中纠缠的产生和表征是实现实用量子协议的必要前提。在这里，我们使用量子干涉分束器工程师超纠缠的偏振和离散频率自由度（DOF）。我们展示了如何独立的测量偏振和频率自由度允许验证高维纠缠的组合状态空间。这些结果可能表明新的路径走向实际利用纠缠存储在多个自由度，特别是在高维量子信息处理协议的背景下。
Entanglement and quantum interference are key ingredients in a variety of quantum information processing tasks. Harnessing the generation and characterization of entanglement in high-dimensional state spaces is a necessary prerequisite towards practical quantum protocols. Here, we use quantum interference on a beam splitter to engineer hyperentanglement in polarization and discrete frequency degrees of freedom (DOF). We show how independent measurements of polarization and frequency DOF allow for the verification of high-dimensional entanglement in the combined state space. These results may indicate new paths towards practical exploitation of entanglement stored in multiple degrees of freedom, in particular in the context of high-dimensional quantum information processing protocols.