Unambiguous discrimination of general quantum operations

• DOI: 10.48550/arxiv.2404.13317
• Publication Date: 2024-04-20
• 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 Physics; 0303 health sciences; 03 medical and health sciences; FOS: Physical sciences; Physical and Materials Sciences; Quantum Physics (quant-ph)

The discrimination of quantum operations has long been an intriguing challenge, with theoretical research significantly 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 non-unitary remained elusive. In systems, especially those high dimensions, preparation arbitrary states implementation generalized measurements are non-trivial tasks. Here, for first time, we experimentally demonstrate optimal unambiguous up 6 displacement operators operations. Our results powerful tools information processing expected stimulate a wide range valuable applications field sensing.