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Unmodulated spin chains as universal quantum wires

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arxiv quant-ph/0505097 v1 pith:W33GZQLS submitted 2005-05-13 quant-ph

Antoni Wojcik , Tomasz Luczak , Pawel Kurzynski , Andrzej Grudka , Tomasz Gdala , Malgorzata Bednarska This is my paper · ORCID
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We study a quantum state transfer between two qubits interacting with the ends of a quantum wire consisting of linearly arranged spins coupled by an excitation conserving, time-independent Hamiltonian. We show that if we control the coupling between the source and the destination qubits and the ends of the wire, the evolution of the system can lead to an almost perfect transfer even in the case in which all nearest-neighbour couplings between the internal spins of the wire are equal.

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Cited by 1 Pith paper

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  1. Spectral surgery and high-fidelity quantum state transfer in $XX$ chains

    quant-ph 2024-12 conditional novelty 6.0 of 10

    Spectral surgery on a uniform XX chain yields analytic spin chains that interpolate between uniform and Krawtchouk chains and achieve good-fidelity state transfer with bounded couplings.

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