Green, Alaina M. and Elben, A. and Huerta Alderete, C. and Joshi, Lata Kh. and Nguyen, Nhung H. and Zache, Torsten V. and Zhu, Yingyue and Sundar, Bhuvanesh and Linke, Norbert M. (2022) Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. Physical Review Letters, 128 (14). Art. No. 140601. ISSN 0031-9007. doi:10.1103/physrevlett.128.140601. https://resolver.caltech.edu/CaltechAUTHORS:20220406-423731047
This is the latest version of this item.
![[img]](https://authors.library.caltech.edu/style/images/fileicons/application_pdf.png) |
PDF
- Published Version
See Usage Policy. 781kB |
|
PDF
- Submitted Version
See Usage Policy. 759kB |
|
PDF (experimental details which are not relevant to the results in the main text but would be required to reproduce the results)
- Supplemental Material
See Usage Policy. 721kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20220406-423731047
Abstract
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.
| Item Type: | Article | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| ||||||||||||||||||||||
| ORCID: |
| ||||||||||||||||||||||
| Additional Information: | © 2022 American Physical Society. (Received 3 December 2021; revised 3 February 2022; accepted 9 March 2022; published 6 April 2022) A. E. acknowledges funding by the German National Academy of Sciences Leopoldina under the Grant No. LPDS 2021-02 and by the Walter Burke Institute for Theoretical Physics, Caltech. L. K. J. acknowledges the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 731473 (QuantERA via QT-FLAG) and the Austrian Science Foundation (FWF, P 32597 N). T. V. Z.’s work is supported by the Simons Collaboration on Ultra-Quantum Matter, which is a grant from the Simons Foundation (651440, P. Z.). This work received support from the National Science Foundation through the Quantum Leap Challenge Institute for Robust Quantum Simulation (OMA-2120757) and the Physics Frontier Center (PHY-1430094) at the Joint Quantum Institute (JQI). A. M. G. is supported by a JQI Postdoctoral Fellowship. N. M. L. acknowledges funding by the Maryland-Army-Research-Lab Quantum Partnership (W911NF1920181), the Department of Energy, Office of Science, Office of Nuclear Physics (DE-SC0021143), and the Office of Naval Research (N00014-20-1-2695). We thank Ana Maria Rey and Murray Holland for a careful reading of the manuscript. | ||||||||||||||||||||||
| Group: | Walter Burke Institute for Theoretical Physics | ||||||||||||||||||||||
| Funders: |
| ||||||||||||||||||||||
| Issue or Number: | 14 | ||||||||||||||||||||||
| DOI: | 10.1103/physrevlett.128.140601 | ||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20220406-423731047 | ||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20220406-423731047 | ||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||
| ID Code: | 114183 | ||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||
| Deposited By: | George Porter | ||||||||||||||||||||||
| Deposited On: | 06 Apr 2022 13:36 | ||||||||||||||||||||||
| Last Modified: | 06 Apr 2022 22:00 |
Available Versions of this Item
- Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. (deposited 06 Apr 2022 13:36) [Currently Displayed]
Commentary/Response Threads
- Green, Alaina M. and Elben, A. and Huerta Alderete, C. and Joshi, Lata Kh. and Nguyen, Nhung H. and Zache, Torsten V. and Zhu, Yingyue and Sundar, Bhuvanesh and Linke, Norbert M. Experimental Measurement of Out-of-Time-Ordered Correlators at Finite Temperature. (deposited 06 Apr 2022 13:36) [Currently Displayed]
Repository Staff Only: item control page
