Local Realism in Quantum Many Worlds

TL;DR

This paper proposes a new framework that incorporates local realism and many-worlds interactions, reconciling quantum mechanics with classical principles and addressing Bell theorem limitations.

Contribution

It introduces a generalized quantum framework with many-worlds interactions that aligns local realism with quantum experimental results, challenging traditional Bell theorem assumptions.

Findings

Local realism can be compatible with quantum mechanics under the new framework.

Bell theorem assumptions cannot be strictly fulfilled in real experiments.

The approach explains experimental results involving single qubit coherence and EPR steering.

Abstract

Fundamental principle of classical physics -- local realism, means that freely chosen observations can be explained by a local (slower than light) real process. It is apparently violated in quantum mechanics as shown by Bell theorem. Despite extreme efforts experiments have not conclusively confirmed this violation due to loopholes. We propose a new postulate that the description of quantum processes must be consistent with local realism, It also assumes existence of many worlds/copies of the same system, interacting weakly microscopically but strongly macroscopically, whose number can be estimated experimentally.Bell theorem will never address a real experiment because its assumptions cannot be strictly fulfilled. By an appropriate generalization of quantum framework and measurement postulates, in particular taking into account freedom of choice, local realism agrees with quantum mechanics and the performed experiments, also involving single qubit coherence and a weaker version of the Bell test, Einstein-Podolsky-Rosen steering.