A Krylov-space approach provides exact expressions for the Lieb-Robinson velocity and quantum speed limit in the single-excitation subspace of inhomogeneous spin ensembles, revealing strong dependence on the resonance frequency distribution.
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A Krylov staggering parameter derived from Lanczos coefficients analytically distinguishes topological phases in the short-range Kitaev model and tracks boundary versus bulk control of the gap in long-range cases.
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Quantum information spreading in inhomogeneous spin ensembles
A Krylov-space approach provides exact expressions for the Lieb-Robinson velocity and quantum speed limit in the single-excitation subspace of inhomogeneous spin ensembles, revealing strong dependence on the resonance frequency distribution.
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Long-Range Pairing in the Kitaev Model: Krylov Subspace Signatures
A Krylov staggering parameter derived from Lanczos coefficients analytically distinguishes topological phases in the short-range Kitaev model and tracks boundary versus bulk control of the gap in long-range cases.