In disordered variants of the Su-Schrieffer-Heeger model, the entanglement entropy difference ΔS^A between half-filled and near-half-filled ground states is zero in the topological phase and finite in the trivial phase, providing a robust diagnostic that can outperform the topological invariant Q.
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Bethe Ansatz analysis of the non-Hermitian Kondo model identifies a novel ~YSR phase for intermediate loss strengths alpha, yielding a four-phase diagram controlled by two RG invariants.
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Entanglement entropy as a probe of topological phase transitions
In disordered variants of the Su-Schrieffer-Heeger model, the entanglement entropy difference ΔS^A between half-filled and near-half-filled ground states is zero in the topological phase and finite in the trivial phase, providing a robust diagnostic that can outperform the topological invariant Q.
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Dissipation driven phase transition in the non-Hermitian Kondo model
Bethe Ansatz analysis of the non-Hermitian Kondo model identifies a novel ~YSR phase for intermediate loss strengths alpha, yielding a four-phase diagram controlled by two RG invariants.