In a three-resonator model, an asymptotic exceptional point at a Hermitian diabolic point enables chiral-mode switching with eigenvalue response scaling as the 3/2 power of perturbation strength.
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Mixed-state topology in non-Hermitian systems is characterized via the Uhlmann connection, yielding a thermal Uhlmann-Chern number that differs from pure-state topology and extends to higher-dimensional Abelian and non-Abelian cases.
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Chiral-Mode Control around a Hermitian Diabolic Point in Discrete Non-Hermitian Coupled Resonators
In a three-resonator model, an asymptotic exceptional point at a Hermitian diabolic point enables chiral-mode switching with eigenvalue response scaling as the 3/2 power of perturbation strength.
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Mixed-State Topology in Non-Hermitian Systems
Mixed-state topology in non-Hermitian systems is characterized via the Uhlmann connection, yielding a thermal Uhlmann-Chern number that differs from pure-state topology and extends to higher-dimensional Abelian and non-Abelian cases.