This paper consists mainly in a discussion of Teh’s critique of Rovelli’s claim that gauge dependent quantities have a modal relational status, in particular in the context of electrodynamics. After assessing the critique and acknowledging some of its strength, I will provide a better case study in the context of QED2+1 applied to condensed matter physics. In this context, Rovelli’s claim seems more robust against Teh’s critique.
Guay, A. (2017). Why gauge? Rovelli and Teh on electrodynamics. Direct empirical status and the ontology of symmetries in physics, Louvain-la-Neuve. https://hdl.handle.net/2078.5/174619