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Eigenvalues of two-state quantum walks induced by the Hadamard walk

Existence of the eigenvalues of the discrete-time quantum walks is deeply related to localization of the walks. We revealed the distributions of the eigenvalues given by the splitted generating function method (the SGF method) of the quantum walks we had treated in our previous studies. In particular, we focused on two kinds of the Hadamard walk with one defect models and the two-phase QWs that have phases at the non-diagonal elements of the unitary transition operators. As a result, we clarified the characteristic parameter dependence for the distributions of the eigenvalues with the aid of numerical simulation.

preprint2019arXivOpen access
Shimpei EndoTakako EndoTakashi KomatsuNorio Konno
math.SPquant-ph
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Shimpei EndoTakako EndoTakashi KomatsuNorio Konno

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