报告题目：Three-outcome Bell inequalities tailored to SU3 many-body systems

报 告 人：Guillem Müller Rigat (ICFO)

报告时间：2025年7月1日10：00

报告地点：物理楼W260

报告简介：We present a three-outcome Bell inequality which we show to be naturally suited to explore non-local correlations in many-body spin-1 systems or SU(3) models. From such an inequality, we show how simple bounds on single-particle observables can be used to construct Bell dimension witnesses, i.e., criteria whose violation signals the impossibility of reproducing the inferred correlations by Hilbert spaces of a certain dimension. In specific, our approach allows the use of violation depth to certify the number of genuine qutrits in an ensemble of arbitrary size.Next, we demonstrate that spin-nematic-squeezed correlations maximally violate the introduced criterion. These statistics naturally arise in spin-1 Bose-Einstein condensates and can be leveraged for sub-shot-noise multiphase estimation tasks.Finally, time permitting, I will comment on some intriguing connections between Bell nonlocality and quantum chaos, resulting from the eigenvalue spacing distribution of the Bell operator.