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Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature.

Publication ,  Journal Article
Green, AM; Elben, A; Alderete, CH; Joshi, LK; Nguyen, NH; Zache, TV; Zhu, Y; Sundar, B; Linke, NM
Published in: Physical review letters
April 2022

Out-of-time-ordered correlators (OTOCs) are a key observable in a wide range of interconnected fields including many-body physics, quantum information science, and quantum gravity. Measuring OTOCs using near-term quantum simulators will extend our ability to explore fundamental aspects of these fields and the subtle connections between them. Here, we demonstrate an experimental method to measure OTOCs at finite temperatures and use the method to study their temperature dependence. These measurements are performed on a digital quantum computer running a simulation of the transverse field Ising model. Our flexible method, based on the creation of a thermofield double state, can be extended to other models and enables us to probe the OTOC's temperature-dependent decay rate. Measuring this decay rate opens up the possibility of testing the fundamental temperature-dependent bounds on quantum information scrambling.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2022

Volume

128

Issue

14

Start / End Page

140601

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Green, A. M., Elben, A., Alderete, C. H., Joshi, L. K., Nguyen, N. H., Zache, T. V., … Linke, N. M. (2022). Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. Physical Review Letters, 128(14), 140601. https://doi.org/10.1103/physrevlett.128.140601
Green, Alaina M., A. Elben, C Huerta Alderete, Lata Kh Joshi, Nhung H. Nguyen, Torsten V. Zache, Yingyue Zhu, Bhuvanesh Sundar, and Norbert M. Linke. “Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature.Physical Review Letters 128, no. 14 (April 2022): 140601. https://doi.org/10.1103/physrevlett.128.140601.
Green AM, Elben A, Alderete CH, Joshi LK, Nguyen NH, Zache TV, et al. Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. Physical review letters. 2022 Apr;128(14):140601.
Green, Alaina M., et al. “Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature.Physical Review Letters, vol. 128, no. 14, Apr. 2022, p. 140601. Epmc, doi:10.1103/physrevlett.128.140601.
Green AM, Elben A, Alderete CH, Joshi LK, Nguyen NH, Zache TV, Zhu Y, Sundar B, Linke NM. Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. Physical review letters. 2022 Apr;128(14):140601.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2022

Volume

128

Issue

14

Start / End Page

140601

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences