讲座题目：Quantum theory is incompatible with relativity: A new proof beyond Bell's theorem
高山，山西大学科学技术哲学研究中心教授，青年长江学者,《国际量子基础杂志》创刊人和执行主编。2013年从悉尼大学科学史与科学哲学系获得哲学博士学位。2016年与Mary Bell共同编著贝尔定理发现50周年纪念文集《Quantum Nonlocality and Reality》。已出版学术专著《The Meaning of the Wave Function: In Search of the Ontology of Quantum Mechanics》（剑桥大学出版社，2017）。主要研究方向为物理学哲学、心灵哲学和一般科学哲学。2017年入选“教育部青年长江学者”。
It has been debated whether quantum mechanics and special relativity are incompatible. Bell's theorem is an important cornerstone, but it does not give us a definite positive answer due to the existence of theoretical loopholes; there are unitary quantum theories which evade Bell's theorem and claim that they are compatible with special relativity. In this talk, I will address the important issue of whether unitary quantum theories are compatible with special relativity. I propose a new Gedanken experiment, a variant of EPR-Bohm experiment with a superobserver who can undo a measurement. In this experiment, there is a stronger correlation than the correlation investigated in Bell's theorem. Based on an analysis of the correlations in different Lorentz frames, I prove that unitary quantum theories are incompatible with special relativity, and in order to avoid the incompatibility, there must exist a preferred Lorentz frame in these theories. This closes the major theoretical loopholes of Bell's theorem, including relationalism, retrocausality, and superdeterminism.