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

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

12 Citations (Scopus)

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
Pages (from-to)	1-6
Number of pages	6
Journal	Physical Review A
Volume	95
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.95.052132
Publication status	Published - 31 May 2017
Externally published	Yes

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10.1103/PhysRevA.95.052132

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

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