Efficient quantum-state estimation by continuous weak measurement and dynamical control

Gregory A Smith, Andrew Silberfarb, Ivan H. Deutsch, Poul S Jessen

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

We demonstrate a fast, robust, and nondestructive protocol for quantum-state estimation based on continuous weak measurement in the presence of a controlled dynamical evolution. Our experiment uses optically probed atomic spins as a test bed and successfully reconstructs a range of trial states with fidelities of ∼90%. The procedure holds promise as a practical diagnostic tool for the study of complex quantum dynamics, the testing of quantum hardware, and as a starting point for new types of quantum feedback control.

Original languageEnglish (US)
Article number180403
JournalPhysical Review Letters
Volume97
Issue number18
DOIs
StatePublished - 2006

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state estimation
test stands
feedback control
hardware

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Efficient quantum-state estimation by continuous weak measurement and dynamical control. / Smith, Gregory A; Silberfarb, Andrew; Deutsch, Ivan H.; Jessen, Poul S.

In: Physical Review Letters, Vol. 97, No. 18, 180403, 2006.

Research output: Contribution to journalArticle

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