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Quantum Information Processing

Erschienen in:

01.06.2021

Direct state measurements under state-preparation-and-measurement errors

verfasst von: Kieu Quang Tuan, Hung Q. Nguyen, Le Bin Ho

Erschienen in: Quantum Information Processing | Ausgabe 6/2021

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Abstract

Direct state measurement (DSM) is a tomography method that allows for retrieving quantum states’ wave functions directly. However, a shortcoming of current studies on the DSM is that it does not provide access to noisy quantum systems. Here, we attempt to fill the gap by investigating the DSM measurement precision that undergoes the state-preparation-and-measurement (SPAM) errors. We manipulate a quantum controlled measurement framework with various configurations and compare the efficiency between them. Under such SPAM errors, the state to be measured lightly deviates from the true state, and the measurement error in the postselection process results in less accurate in the tomography. Our study could provide a reliable tool for SPAM errors tomography and contribute to understanding and resolving an urgent demand for current quantum technologies.

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Titel: Direct state measurements under state-preparation-and-measurement errors
verfasst von: Kieu Quang Tuan
Hung Q. Nguyen
Le Bin Ho
Publikationsdatum: 01.06.2021
Verlag: Springer US
Erschienen in: Quantum Information Processing / Ausgabe 6/2021
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-021-03144-7

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