A Bethe-ansatz analysis yields the impurity entropy across the four phases and predicts entropy overshoots above ln 2 when a midgap YSR bound state is thermally activated.
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Thermodynamics in a split Hilbert space: Quantum impurity at the edge of a one-dimensional superconductor
A Bethe-ansatz analysis yields the impurity entropy across the four phases and predicts entropy overshoots above ln 2 when a midgap YSR bound state is thermally activated.