A gauge fixing procedure for causal fermion systems

@article{Finster2020AGF,
  title={A gauge fixing procedure for causal fermion systems},
  author={Felix Finster and S. Kindermann},
  journal={Journal of Mathematical Physics},
  year={2020},
  volume={61},
  pages={082301}
}
Causal fermion systems incorporate local gauge symmetry in the sense that the Lagrangian and all inherent structures are invariant under local phase transformations of the physical wave functions. In the present paper, it is explained and worked out in detail that, despite this local gauge freedom, the structures of a causal fermion system give rise to distinguished gauges where the local gauge freedom is fixed completely up to global gauge transformations. The main method is to use spectral… 
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