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Inhomogeneous Quantum Walks

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arxiv 0906.3692 v1 pith:BTTN3UIJ submitted 2009-06-19 quant-ph

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keywords walksquantumanalyzeclassconstructioninhomogeneouspositionasymptotic
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We study a natural construction of a general class of inhomogeneous quantum walks (namely walks whose transition probabilities depend on position). Within the class we analyze walks that are periodic in position and show that, depending on the period, such walks can be bounded or unbounded in time; in the latter case we analyze the asymptotic speed. We compare the construction to others in the existing literature. As an example we give a quantum version of a non-irreducible classical walk: the Polya Urn.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Singular continuous Cantor spectrum for magnetic quantum walks

    quant-ph 2019-08 accept novelty 7.0 of 10

    For irrational magnetic flux, the spectrum of the two-dimensional Hadamard magnetic quantum walk is a zero-measure Cantor set and the walk has no pure point spectrum, so the spectrum is purely singular continuous.

  2. Crystalline Spectral Form Factors

    quant-ph 2025-12 conditional novelty 6.0 of 10

    Strong level repulsion produces damped crystalline oscillations of the spectral form factor, with a Debye-Waller suppression, a new plateau time scale t* ≈ t_H sqrt(β/4), and predictable derivative singularities.

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