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Cited by 369Quantum many-body systemsQuantum Information and CryptographyQuantum Computing Algorithms and Architecture

The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.

Verified quantum information scrambling

Open access
Landsman, K. A., Figgatt, C., Schuster, T., Linke, N. M., Yoshida, B., Yao, N. Y., Monroe, C.·2019·Nature
DOI 10.1038/s41586-019-0952-6
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Abstract

Quantum scrambling is the dispersal of local information into many-body quantum entanglements and correlations distributed throughout an entire system. This concept accompanies the dynamics of thermalization in closed quantum systems, and has recently emerged as a powerful tool for characterizing chaos in black holes 1-4. However, the direct experimental measurement of quantum scrambling is difficult, owing to the exponential complexity of ergodic many-body entangled states. One way to characterize quantum scrambling is to measure an out-of-time-ordered correlation function (OTOC); however, because scrambling leads to their decay, OTOCs do not generally discriminate between quantum scrambling and ordinary decoherence. Here we implement a quantum circuit that provides a positive test for the scrambling features of a given unitary process 5,6. This approach conditionally teleports a quantum state through the circuit, providing an unambiguous test for whether scrambling has occurred, while simultaneously measuring an OTOC. We engineer quantum scrambling processes through a tunable three-qubit unitary operation as part of a seven-qubit circuit on an ion trap quantum computer. Measured teleportation fidelities are typically about 80 per cent, and enable us to experimentally bound the scrambling-induced decay of the corresponding OTOC measurement.

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Metadata

Authors
Landsman, K. A., Figgatt, C., Schuster, T., Linke, N. M., Yoshida, B., Yao, N. Y., & Monroe, C.
Affiliations
  • Joint Center for Quantum Information and Computer Science (US)
  • University of California, Berkeley (US)
  • Perimeter Institute (CA)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
Landsman, K. A.
ORCID
Venue
Nature
Publisher
Springer Science and Business Media LLC
Published
2019-03-06
Volume
567
Issue
7746
Pages
61-65
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
DOI
10.1038/s41586-019-0952-6
OpenAlex
W2805441291
Cited by
368
References
51
Citations by year
2026: 25 · 2025: 44 · 2024: 53 · 2023: 55 · 2022: 53 · 2021: 62 · 2020: 47 · 2019: 28
FWCI
20.89
Type
journal article
Language
en
Open access
Licence
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
Keywords
quantum scrambling, quantum chaos, quantum teleportation, ion trap quantum computing, decoherence, thermalization, black holes

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