报告题目：Limitations on sharing Bell nonlocality between sequential pairs of observers

报告时间：2021年10月19日（周二）15: 30

腾讯会议 ID: 928 513 160

报告摘要：We give strong analytic and numerical evidence that, under mild measurement assumptions, two qubits cannot both be recycled to generate Bell nonlocality between multiple independent observers on each side. This is surprising, as under the same assumptions it is possible to recycle just one of the qubits an arbitrarily large number of times [P. J. Brown and R. Colbeck, Phys. Rev. Lett. 125, 090401 (2020)]. We derive corresponding 'one-sided monogamy relations' that rule out two-sided recycling for a wide range of parameters, based on a general tradeoff relation between the strengths and maximum reversibilities of qubit measurements. Our methods may be readily applied to other types of quantum correlations, such as steering and entanglement, and hence to general information protocols involving sequential measurements.

报告人简介：程书明，博士，同济大学研究员。以第一作者或通讯作者在量子物理顶刊 Phys. Rev. Lett. 和 Phys. Rev. A 发表论文10 余篇。2019年被数学物理期刊 J. Phys. A. 评为优秀审稿人。参与翻译科普书籍《爱因斯坦也犯错：天才的一生》。