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.