Decoherence of the color code produces a mixed state with topological entanglement negativity ln 2 that corresponds to an emergent single toric code.
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An exactly solvable model of a quantum chain coupled to a cavity photon via dipole interaction yields a closed-form reduced density matrix that reveals logarithmic light-matter and spatial entanglement scaling with system size at strong coupling, arising from photon resolution of collective dipole P
Z_N bivariate-bicycle codes have essential topological properties determined by their Z_p prime-factor counterparts, enabling generalization of algebraic-geometric methods to anyon fusion rules and resolution of quasifractonic behavior via symmetry-enriched topological order.
Machine learning reconstruction accuracy is substantially higher for spectral-edge eigenstates than for mid-spectrum eigenstates, providing a new quantitative measure of information content in many-body quantum states.
Momentum-space entanglement entropy reaches ln 2 at DQPTs via exact degeneracy p=1/2 in the post-quench eigenbasis, providing a time-independent diagnostic.
A QMC-based framework tests the lattice-Bisognano-Wichmann ansatz for reconstructing entanglement Hamiltonians in 2D systems without Lorentz invariance or translational symmetry, finding good accuracy for ordinary boundaries.
Higher-form entanglement asymmetry serves as a sub-leading order parameter for 2D Abelian topological order, comparable to topological entanglement entropy and expressible via quantum dimension, with scaling that detects order even in deformed models.
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