This is a comment on J. A. Barrett's article ‘The Preferred-Basis Problem and the Quantum Mechanics of Everything’ (), which concerns theories postulating that certain quantum observables have determinate values, corresponding to additional (often called ‘hidden’) variables. I point out that it is far from clear, for most observables, what such a postulate is supposed to mean, unless the postulated additional variable is related to a clear ontology in space-time, such as particle world lines, string world sheets, or fields.
Journal Article. 2013 words. Illustrated.
Subjects: Philosophy of Science ; Science and Mathematics
Full text: subscription required