Bell's Inequality, Quantum Measurement and Einstein Realism: A Unified Perspective

TL;DR

This paper reexamines Bell's inequality's foundations, linking its reality condition to the quantum measurement problem, and argues that violations imply nonlocality, connecting to Einstein's realism.

Contribution

It provides a unified perspective showing that Bell's inequality is rooted in the measurement problem and generalizes Einstein's realism, clarifying implications of its violation.

Findings

Bell's inequality relates to the quantum measurement problem.

Violations imply nonlocality due to measurement issues.

The reality condition extends Einstein's realism.

Abstract

The logical foundations of Bell's inequality are reexamined. We argue that the form of the reality condition that underpins Bell's inequality comes from the requirement of solving the quantum measurement problem. Hence any violation of Bell's inequality necessarily implies nonlocality because of the measurement problem. The differences in the implications of deterministic and stochastic formulations of Bell's inequality are highlighted. The reality condition used in Bell's inequality is shown to be a generalisation of Einstein's later form of realism.