From Bell's inequalities to quantum information: a new quantum age?

Alain Aspect

Jiangmei Tang, Qingsheng Zeng, Yandong Zhang +1 more

Abstract Bell inequality plays a crucial role in the debate between quantum mechanical completeness and local realism. It vigorously promoted researches on these aspects, macroscopic quantum superposition states, especially entangled states, and it has brought the debate from theory to experiment, which generated a new discipline, quantum information theory. Thus, this work briefly summarizes some major situations in the verification process of Bell inequality. At the same time, this work analyses existent some problems in the verification process of Bell inequality, and states own perception for the debate.This work can help people better understand the foundation knowledge of quantum information theory, thus quantum information theory can be applied to more actual situations.

Pierre Meystre, Murray Sargent

WU Xin-zhong

This paper examines the history of Bell’s inequality from EPR argument to Bell’s papers, and the influence of Bell’s inequality on the frontier exploration of quantum mechanics. It is found that Bell’s inequality has some hidden assumptions that are different from EPR argument. Some scholars have led to the erroneous conclusion that quantum information exceeds the speed of light. Along Schrodinger's idea that the measurement process of the EPR experiment requires time, Karl Hess treated time as a time order parameter, and got a local hidden variable inequality that is different from Bell’s inequality. Joy Christian extended the method of space-time geometry analysis of relativity to the localized geometry analysis of quantum states, and found that the reasoning of Bell’s inequality does not meet the requirements of the completeness of EPR argument. The mainstream quantum gravity researches have made great progress, but there are many disagreements. According to Einstein's local realism, some new interpretations and new representations of quantum mechanics are given, which may open up new ideas for quantum gravity research.

Emilio Santos

A. Mann, M. Revzen, Emilio Santos