The De Broglie-Bohm theory {\it is} and {\it is not} a hidden variable theory

Abstract

We will first define what is meant by ``hidden variables". Then, we will review various theorems proving the impossibility of theories introducing such variables and then show that the de Broglie-Bohm theory is not refuted by those theorems. We will also explain the relation between those theorems and nonlocality, with or without introducing Bell's inequalities.

This is a draft of a chapter that has been accepted for publication by Oxford University Press in the forthcoming book "Guiding Wave in Quantum Mechanics: 100 Years of de Broglie-Bohm Pilot-Wave Theory" edited by Andrea Oldofredi, due for publication in 2023