学术报告报告主题: Unbounded Sharing of Nonlocality Using Qubit Projective Measurements
报 告 人: Dr. Souradeep Sasmal
报告时间：2024年12月17日（星期二）下午14:30-15:30
报告地点：#腾讯会议：820-481-466
邀 请 人: 李茂生 副教授
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数学学院
2024年12月16日
报告摘要：
The prevailing consensus is that the sequential sharing of nonlocality in a Bell experiment requires generalised unsharp measurements, given that a sharp measurement inevitably destroys the entanglement of the shared state. In contrast, we introduce a qubit projective measurement based protocol aided with local randomness that enables the sharing of nonlocality by an arbitrary number of sequential observers (Bobs) with a single spatially separated observer (Alice). We achieve this by identifying a crucial interplay between the degrees of measurement incompatibilities of Alice and Bob for demonstrating the unbounded sharing of nonlocality. Our findings not only offer a new paradigm for understanding the fundamental nature of measurement incompatibility in demonstrating quantum nonlocality, but also paves the path for various information processing tasks based on the local randomness-assisted projective measurement.
报告人介绍：
Souradeep Sasmal is a postdoctoral researcher at the Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu. His primary research interests encompass quantum foundations and quantum information, with a focus on quantum nonlocality, steering, cryptography, and randomness certification. In recent years, his work has concentrated on the self-testing of quantum devices and exploring the role of measurement incompatibility and quantum correlations in precision metrology.