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/lp/wiley/pure-state-tomography-with-fourier-transformation-4qVirveHhu
- Publisher
- Wiley
- Copyright
- © 2022 Wiley‐VCH GmbH
- eISSN
- 2511-9044
- DOI
- 10.1002/qute.202100091
- Publisher site
- See Article on Publisher Site
Abstract
Extracting information from quantum devices has long been a crucial problem in the field of quantum mechanics. By performing elaborate measurements, quantum state tomography, an important and fundamental tool in quantum science and technology, can be used to determine unknown quantum states completely. In this study, methods to determine multi‐qubit pure quantum states uniquely and directly are explored. Two adaptive protocols are proposed, with their respective quantum circuits. Herein, two or three observables are sufficient, while the number of measurement outcomes are either the same as or fewer than those in existing methods. Additionally, experiments on the IBM 5‐qubit quantum computer, as well as numerical investigations, demonstrate the feasibility of the proposed protocols.
Journal
Advanced Quantum Technologies – Wiley
Published: Aug 1, 2022
Keywords: Fourier transformation; N ‐qubit pure state; projective measurements; quantum circuits; quantum state tomography