Unambiguous discrimination of general quantum operations

• DOI: 10.1126/sciadv.adq2529
• Publication Date: 2024-11-13T19:00:02Z
• Authors: Weizhou Cai; Jing-Ning Zhang; Ziyue Hua; Weiting Wang; Xiaoxuan Pan; Xinyu Liu; Yuwei Ma; Ling Hu; Xianghao Mu; Haiyan Wang; Yipu Song; Chang-Ling Zou; Luyan Sun
• Keywords: Quantum imaging

The discrimination of quantum operations has long been an intriguing challenge, with theoretical research notably advancing our understanding the features in discriminating objects. This challenge is closely related to states, and proof-of-principle demonstrations latter have already realized using optical photons. However, experimental demonstration general operations, including both unitary nonunitary remained elusive. In systems, especially those high dimensions, preparation arbitrary states implementation generalized measurements are nontrivial tasks. Here, we experimentally demonstrate optimal unambiguous up six displacement operators operations. Our results powerful tools for information processing expected stimulate a wide range valuable applications field sensing.