Experimentally Verified Approach to Nonentanglement-Breaking Channel Certification
Yingqiu Mao, Yi-Zheng Zhen, Hui Liu, Mi Zou, Qi-jie Tang, Sijie Zhang, Jian Wang, Hao Liang, Weijun Zhang, Hao Li, Lixing You, Zhen Wang, Li Li, Nai-Le Liu, Kai Chen, Teng‐Yun Chen, Jian-Wei Pan
Abstract
Ensuring the nonentanglement-breaking (non-EB) property of quantum channels is crucial for the effective distribution and storage of quantum states. However, a practical method for direct and accurate certification of the non-EB feature is highly desirable. Here, we propose and verify a realistic source based measurement device independent certification of non-EB channels. Our method is resilient to repercussions on the certification from experimental conditions, such as multiphotons and imperfect state preparation, and can be implemented with an information incomplete set. We achieve good agreement between experimental outcomes and theoretical predictions, which is validated by the expected results of the ideal semiquantum signaling game, and accurately certify the non-EB channels. Furthermore, our approach is highly robust to effects from noise. Therefore, the proposed approach can be expected to play a significant role in the design and evaluation of realistic quantum channels.