Fracton phases via exotic higher-form symmetry-breaking

Oct 5, 2020
21 pages
Published in:
  • Annals Phys. 424 (2021) 168360
  • Published: Nov 26, 2020
    and
  • Published: Jan, 2021
e-Print:
DOI:

Citations per year

2020202120222023202405101520
Abstract: (Elsevier Inc.)
We study p-string condensation mechanisms for fracton phases from the viewpoint of higher-form symmetry, focusing on the examples of the X-cube model and the rank-two symmetric-tensor U(1) scalar charge theory. This work is motivated by questions of the relationship between fracton phases and continuum quantum field theories, and also provides general principles to describe p-string condensation independent of specific lattice model constructions. We give a perspective on higher-form symmetry in lattice models in terms of cellular homology. Applying this perspective to the coupled-layer construction of the X-cube model, we identify a foliated 1-form symmetry that is broken in the X-cube phase, but preserved in the phase of decoupled toric code layers. Similar considerations for the scalar charge theory lead to a framed 1-form symmetry. These symmetries are distinct from standard 1-form symmetries that arise, for instance, in relativistic quantum field theory. We also give a general discussion on interpreting p-string condensation, and related constructions involving gauging of symmetry, in terms of higher-form symmetry.
Note:
  • 21 pages, 7 figures. v2: final published version, minor changes from v1
  • Fracton phases
  • Higher symmetry
  • model: lattice
  • charge: scalar
  • field theory: scalar
  • condensation
  • symmetry breaking
  • homology
  • fractional
  • string