Remote parameter estimation in a quantum spin chain enhanced by local control

Jukka Kiukas, Kazuya Yuasa, Daniel Burgarth

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    Abstract

    We study the interplay of control and parameter estimation on a quantum spin chain. A single qubit probe is attached to one end of the chain, while we wish to estimate a parameter on the other end. We find that control on the probe qubit can substantially improve the estimation performance and discover some interesting connections to quantum state transfer.

    Original languageEnglish
    Article number052132
    JournalPhysical Review A
    Volume95
    Issue number5
    DOIs
    Publication statusPublished - 2017 May 31

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    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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