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

Jukka Kiukas; Kazuya Yuasa; Daniel Burgarth

doi:10.1103/PhysRevA.95.052132

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

Jukka Kiukas, Kazuya Yuasa, Daniel Burgarth

Department of Mathematics

Waseda University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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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 language	English
Article number	052132
Journal	Physical Review A
Volume	95
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.95.052132
Publication status	Published - 31 May 2017

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title = "Remote parameter estimation in a quantum spin chain enhanced by local control",

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",

author = "Jukka Kiukas and Kazuya Yuasa and Daniel Burgarth",

note = "Funding Information: This work was supported by the Top Global University Project from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. D.B. acknowledges support from the EPSRC Grant No. EP/M01634X/1. K.Y. was supported by the Grant-in-Aid for Scientific Research (C) (No. 26400406) from the Japan Society for the Promotion of Science (JSPS) and by the Waseda University Grant for Special Research Projects (No. 2016K-215 and No. 2017K-236). Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

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AB - 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

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

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Jukka Kiukas

Control characterisation of noisy quantum devices

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

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Control characterisation of noisy quantum devices

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