In a PT-symmetric multichannel Kondo model, exact Bethe ansatz calculations show impurity entropy becomes nonmonotonic in the zero-mode and local-moment phases, breaking generalized g-theorem irreversibility.
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Breakdown of Monotonic Impurity Entropy Flow in $\mathscr{PT}$-Symmetric Multichannel Kondo Systems
In a PT-symmetric multichannel Kondo model, exact Bethe ansatz calculations show impurity entropy becomes nonmonotonic in the zero-mode and local-moment phases, breaking generalized g-theorem irreversibility.