Dynamical poles from Green's function analytic continuation, rather than static bound states, control late-time dynamics in non-Hermitian impurity scattering.
Because ˜g0 is a sum over the selected root branches, a collision that merely permutes roots within the selected set leaves ˜g0 unchanged
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Dynamical Poles in Non-Hermitian Impurity Scattering
Dynamical poles from Green's function analytic continuation, rather than static bound states, control late-time dynamics in non-Hermitian impurity scattering.