Exact density matrix for the Kitaev honeycomb spin liquid is organized by string-operator equivalence classes, producing a symmetry-resolved block-diagonal reduced density matrix that explains extensive entanglement-spectrum degeneracy and entropy separability into gauge and matter sectors.
In our discussion, the gauge is chosen asA 0 = 0, which leads to the relation [A µ(x), Eν(x′)] = −iδµν δ(x−x ′) mentioned in the main text
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Exact Organization of Density Matrices and Entanglement Structure in the Kitaev Spin Liquid
Exact density matrix for the Kitaev honeycomb spin liquid is organized by string-operator equivalence classes, producing a symmetry-resolved block-diagonal reduced density matrix that explains extensive entanglement-spectrum degeneracy and entropy separability into gauge and matter sectors.