Which features of quantum physics are not fundamentally quantum but are due to indeterminism?

TL;DR

This paper argues that many features considered uniquely quantum, like nonlocality and the measurement problem, can be understood through classical indeterminism, with non-classical effects arising from incompatible quantities linked to Planck's constant.

Contribution

It challenges the notion that certain quantum phenomena are inherently non-classical by showing they have classical analogues under indeterministic interpretations.

Findings

Classical indeterminism can replicate quantum paradoxes.

Incompatibility of physical quantities characterizes non-classical effects.

Quantum features are linked to the fundamental constant ar.

Abstract

What is fundamentally quantum? We argue that most of the features, problems, and paradoxes -- such as the measurement problem, the Wigner's friend paradox and its proposed solutions, single particle nonlocality, and no-cloning -- allegedly attributed to quantum physics have a classical analogue if one is to interpret classical physics as fundamentally indeterministic. What really characterizes non-classical effects are incompatible physical quantities, which, in quantum quantum theory are associated to the fundamental constant $\hbar$.