Vindication of Quantum Locality

TL;DR

This paper defends the original proof that quantum physics satisfies Einstein's locality criterion, addressing criticisms that transformations in the Heisenberg picture could imply non-locality.

Contribution

It clarifies and vindicates the previous proof that quantum physics adheres to Einstein's locality criterion, countering recent criticisms.

Findings

The original proof remains valid after addressing criticisms.

Transformations in the Heisenberg picture do not violate Einstein's locality.

Misconceptions about the invariance of factual situations are clarified.

Abstract

In a previous paper [arXiv:quant-ph/9906007] Hayden and I proved, using the Heisenberg picture, that quantum physics satisfies Einstein's criterion of locality. Wallace and Timpson have argued that certain transformations of the Heisenberg- picture description of a quantum system must be regarded as leaving invariant the factual situation being described, and that taking this into account reveals that Einstein's criterion is violated after all. Here I vindicate the proof and explain some misconceptions that have led to this and other criticisms of it.