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Quantum Algorithms

Full control by locally induced relaxation

arXiv

Authors: Daniel Burgarth, Vittorio Giovannetti

Year

2007

Paper ID

50503

Status

Preprint

Abstract Read

~2 min

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Abstract

We demonstrate a scheme for controlling a large quantum system by acting on a small subsystem only. The local control is mediated to the larger system by some fixed coupling Hamiltonian. The scheme allows to transfer arbitrary and unknown quantum states from a memory on the large system ("upload access") as well as the inverse ("download access"). We study sufficient conditions of the coupling Hamiltonian and give lower bounds on the fidelities for downloading and uploading.

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We demonstrate a scheme for controlling a large quantum system by acting on a small subsystem only.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0704.3027 [2] arXiv https://arxiv.org/abs/0704.3027 [3] Publisher https://arxiv.org/abs/0704.3027

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