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  Many-body dephasing in a trapped-ion quantum simulator

Kaplan, H. B., Guo, L., Tan, W. L., De, A., Marquardt, F., Pagano, G., et al. (in press). Many-body dephasing in a trapped-ion quantum simulator. Physical Review Letters, 2001.02477v1.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-7436-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-EE4B-B
Genre: Journal Article

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 Creators:
Kaplan, Harvey B.1, Author
Guo, Lingzhen2, Author
Tan, Wen Lin1, Author
De, Arinjoy1, Author
Marquardt, Florian2, 3, Author              
Pagano, Guido1, 4, Author
Monroe, Christopher1, Author
Affiliations:
1Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park, MD 20742, USA, ou_persistent22              
2Marquardt Division, Max Planck Institute for the Science of Light, Max Planck Society, Staudtstraße 2, 91058 Erlangen, DE, ou_2421700              
3Physics Department, University of Erlangen-Nuremberg, Staudtstrasse 5, 91058 Erlangen, DE, ou_persistent22              
4Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, TX 77005, USA, ou_persistent22              

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 Abstract: How a closed interacting quantum many-body system relaxes and dephases as a function of time is a fundamental question in thermodynamic and statistical physics. In this work, we observe and analyse the persistent temporal fluctuations after a quantum quench of a tunable long-range interacting transverse-field Ising Hamiltonian realized with a trapped-ion quantum simulator. We measure the temporal fluctuations in the average magnetization of a finite-size system of spin-1/2 particles and observe the experimental evidence for the theoretically predicted regime of many-body dephasing. We experiment in a regime where the properties of the system are closely related to the integrable Hamiltonian with global spin-spin coupling, which enables analytical predictions even for the long-time non-integrable dynamics. We find that the measured fluctuations are exponentially suppressed with increasing system size, consistent with theoretical predictions.

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Language(s): eng - English
 Dates: 2020-08-20
 Publication Status: Accepted / In Press
 Pages: -
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 Rev. Type: -
 Identifiers: arXiv: 2001.02477v1
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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: - Volume / Issue: - Sequence Number: 2001.02477v1 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1