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  Universal compressive characterization of quantum dynamics

Kim, Y., Teo, Y. S., Ahn, D., Im, D.-G., Cho, Y.-W., Leuchs, G., et al. (2020). Universal compressive characterization of quantum dynamics. Physical Review Letters, 124(21): 210401. doi:10.1103/PhysRevLett.124.210401.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-12B6-6 Version Permalink: https://hdl.handle.net/21.11116/0000-0008-12B7-5
Genre: Journal Article

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 Creators:
Kim, Yosep1, Author
Teo, Yong Siah1, Author
Ahn, Daekun1, Author
Im, Dong-Gil1, Author
Cho, Young-Wook1, Author
Leuchs, Gerd2, Author
Sanchez-Soto, Luis L.3, Author
Jeong, Hyunseok1, Author
Kim, Yoon-Ho1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, DE, ou_3164407              
3Quantumness, Tomography, Entanglement, and Codes, Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, Staudtstraße 2, 91058 Erlangen, DE, ou_2364709              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Recent quantum technologies utilize complex multidimensional processes that
govern the dynamics of quantum systems. We develop an adaptive
diagonal-element-probing compression technique that feasibly characterizes any
unknown quantum processes using much fewer measurements compared to
conventional methods. This technique utilizes compressive projective
measurements that are generalizable to arbitrary number of subsystems. Both
numerical analysis and experimental results with unitary gates demonstrate low
measurement costs, of order O(d^2) for d-dimensional systems, and
robustness against statistical noise. Our work potentially paves the way for a
reliable and highly compressive characterization of general quantum devices.

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 Dates: 2020-05-282020-01-112020-04-272020-05-27
 Publication Status: Issued
 Pages: 10 pages, 6 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2005.13776
DOI: 10.1103/PhysRevLett.124.210401
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: 7 Volume / Issue: 124 (21) Sequence Number: 210401 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1