For PT-broken quenches, the biorthogonal density matrix drives exponential growth of observables and entanglement, but free-fermion TTC entropy decays linearly due to approximate spectral symmetry.
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Biorthogonal quench dynamics of entanglement and quantum geometry in PT-symmetric non-Hermitian systems
For PT-broken quenches, the biorthogonal density matrix drives exponential growth of observables and entanglement, but free-fermion TTC entropy decays linearly due to approximate spectral symmetry.