Field Theories for type-II fractons

@article{Fontana2022FieldTF,
  title={Field Theories for type-II fractons},
  author={Weslei B. Fontana and Pedro R S Gomes and Claudio Chamon},
  journal={SciPost Physics},
  year={2022}
}
We derive an effective field theory for a type-II fracton starting from the Haah code on the lattice. The effective topological theory is not given exclusively in terms of an action; it must be supplemented with a condition that selects physical states. Without the constraint, the action only describes a type-I fracton. The constraint emerges from a condition that cube operators multiply to the identity, and it cannot be consistently implemented in the continuum theory at the operator… 

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