Efficient measurement of quantum dynamics via compressive sensing

Shabani, A., Kosut, R.L., Mohseni, M., Rabitz, H., Broome, M.A., Almeida, M.P., Fedrizzi, A. and White, A.G. (2011) Efficient measurement of quantum dynamics via compressive sensing. Physical Review Letters, 106 10: Article number 100401. doi:10.1103/PhysRevLett.106.100401

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Author Shabani, A.
Kosut, R.L.
Mohseni, M.
Rabitz, H.
Broome, M.A.
Almeida, M.P.
Fedrizzi, A.
White, A.G.
Title Efficient measurement of quantum dynamics via compressive sensing
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2011-03-01
Year available 2011
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.106.100401
Open Access Status File (Publisher version)
Volume 106
Issue 10
Start page Article number 100401
Total pages 4
Place of publication United States
Publisher American Physical Society
Language eng
Abstract The resources required to characterize the dynamics of engineered quantum systems-such as quantum computers and quantum sensors-grow exponentially with system size. Here we adapt techniques from compressive sensing to exponentially reduce the experimental configurations required for quantum process tomography. Our method is applicable to processes that are nearly sparse in a certain basis and can be implemented using only single-body preparations and measurements. We perform efficient, high-fidelity estimation of process matrices of a photonic two-qubit logic gate. The database is obtained under various decoherence strengths. Our technique is both accurate and noise robust, thus removing a key roadblock to the development and scaling of quantum technologies.
Keyword Restricted isometry property
Process tomography
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID FA9550-09-1-0710
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 100 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 105 times in Scopus Article | Citations
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Created: Sun, 27 Mar 2011, 10:02:59 EST