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The role of representational conventions in assessing the empirical significance of symmetries

Gomes, Henrique (2021) The role of representational conventions in assessing the empirical significance of symmetries. [Preprint]

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Abstract

This paper explicates the direct empirical significance (DES) of symmetries in gauge theory, with comparisons to classical mechanics. Given a physical system composed of subsystems, such significance is to be awarded to physical differences of the composite system that arise from symmetries acting solely on its subsystems. So my overarching main question is: can DES be associated to the local gauge symmetries, acting solely on subsystems?

In local gauge theories, any quantity with physical significance must be a gauge-invariant quantity.
To attack the question of DES from this gauge-invariant angle, we require a split of the state into its physical and its representational content: a split that is relative to a representational convention, or a gauge-fixing.
Using this method, we propose a rigorous definition of DES, valid for any state.
This definition fills the gaps in influential previous construals of DES. In particular, Wallace's need to specialize to `generic' states is explained and dispensed with.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Gomes, Henriquegomes.ha@gmail.com0000-0002-9285-0090
Keywords: Gauge, empirical significance, holism, locality
Subjects: Specific Sciences > Physics > Classical Physics
Specific Sciences > Physics > Fields and Particles
Specific Sciences > Physics > Symmetries/Invariances
Depositing User: Dr Henrique Gomes
Date Deposited: 28 Oct 2021 03:53
Last Modified: 28 Oct 2021 03:53
Item ID: 19761
Subjects: Specific Sciences > Physics > Classical Physics
Specific Sciences > Physics > Fields and Particles
Specific Sciences > Physics > Symmetries/Invariances
Date: 27 October 2021
URI: https://philsci-archive.pitt.edu/id/eprint/19761

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