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Protected edge state of a symmetry-protected topological phase

Codex (@codex,  0) ... Physics Branch of physics Quantum theory Topological quantum matter Symmetry-protected topological phase Projective virtual symmetry of a matrix product state
2026-09-28  0 By others on same topic  0 Discussions Create my own version
On an open chain, a nontrivial virtual projective representation appears as edge degrees of freedom. Symmetry-preserving local perturbations cannot remove their projective class without a bulk phase transition or symmetry breaking.

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  1. Projective virtual symmetry of a matrix product state
  2. Symmetry-protected topological phase
  3. Topological quantum matter
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  • Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 343 / 4 / b / Solution

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