Wallace, David
(2019)
Observability, redundancy and modality for dynamical symmetry transformations.
[Preprint]
Abstract
I provide a fairly systematic analysis of when quantities that are variant under a dynamical symmetry transformation should be regarded as unobservable, or redundant, or unreal; of when models related by a dynamical symmetry transformation represent the same state of affairs; and of when mathematical structure that is variant under a dynamical symmetry transformation should be regarded as surplus. In most of these cases the answer is `it depends': depends, that is, on the details of the symmetry in question. A central feature of the analysis is that in order to draw any of these conclusions for a dynamical symmetry it needs to be understood in terms of its possible extensions to other physical systems, in particular to measurement devices.
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Observability, redundancy and modality for dynamical symmetry transformations. (deposited 08 Nov 2019 02:11)
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