More Detailed Descriptions of Locality and Realism

TL;DR

This paper refines the definitions of locality and realism in quantum mechanics, clarifies their roles in experiments, and proposes feasible schemes to test non-locality and realism with current technology.

Contribution

It provides more detailed descriptions of locality and realism, linking non-realism to quantum states, and suggests experimental schemes to test non-locality and realism.

Findings

Pure or non-maximally mixed states exhibit non-realism.

Proposed experimental schemes are feasible with current technology.

Discussed the connection between non-locality, entanglement, and correlation.

Abstract

Many experiments have shown that locality-realism theory is at variance with quantum mechanics predictions. Although locality and realism, which are two different conceptions, are given respective definition, the descriptions of the both are a little of abstract when they are applied to real experimental situations. The abstract descriptions result in difficulty for one to judge whether the variance come from locality or realism or both. Here we provide more detailed descriptions of locality and realism, and show that any system being in a pure state or a non-maximally mixed state has property of non-realism. We also present experimental schemes feasible under current technologies to test the non-locality realsim. The connections between non-locality and entanglement and correlation are also discussed.