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

Jukka Kiukas, Kazuya Yuasa, Daniel Burgarth

Research output: Contribution to journalArticle

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

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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