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YMSC-BIMSA 量子信息讨论班
YMSC-BIMSA 量子信息讨论班
Unbounded Sharing of Nonlocality Using Qubit Projective Measurements
Unbounded Sharing of Nonlocality Using Qubit Projective Measurements
演讲者
Souradeep Sasmal
时间
2025年09月12日 17:00 至 18:00
地点
Shuangqing-B627
线上
Zoom 230 432 7880
(BIMSA)
摘要
The prevailing consensus is that the sequential sharing of nonlocality in a Bell experiment requires generalised unsharp measurements, since a sharp measurement inevitably destroys the entanglement of the shared state. In contrast, we introduce a qubit projective measurement-based protocol, aided by 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 incompatibility of Alice and Bob, thereby demonstrating the unbounded sharing of nonlocality. Our findings not only offer a new paradigm for understanding the fundamental role of measurement incompatibility in quantum nonlocality, but also pave the way for various information-processing tasks based on local randomness-assisted projective measurements.
演讲者介绍
Souradeep Sasmal is a postdoctoral researcher at the IFFS, University of Electronic Science and Technology of China, Chengdu. His primary research interests lie in 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 sequential quantum correlations in precision metrology. Please let me know if any further information is required.