Speaker: Dr. Yunlong Xiao(University of Calgary)

Title:Quasi-Fine-Grained Uncertainty Relations

Time: Tue, July.31, 2018 , AM:10:00-11:00.

Location: Room 4318, Building No.4, Wushan Campus

Abstract：

  The uncertainty principle, a jewel at the heart of quantum theory,has been expressed by completely different forms, such as universal uncertainty relations,an uncertainty principle in the presence of quantum memory and a fine-grained uncertainty relation.We unify these uncertainty relations based on a special formalization of probability relations,namely introducing quasi-fine-grained uncertainty relations (QFGURs), which combine different measurements performed on spacelike-separated systems.Our generalized probability relations determine whether a quantum measurement exhibits typical quantum correlations and reveal a fundamental connection between basic elements of quantum theory,specifically, uncertainty measures,combined outcomes for different measurements,quantum memory, entanglement and Einstein-Podolsky-Rosen steering. Furthermore,we derive a universal form for entanglement and steering inequalities explicitly by applying our QFGURs.