Many-Body Dephasing in a Trapped-Ion Quantum Simulator

ORAL

Abstract

We observe and analyze 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 [1]. By measuring temporal fluctuations in the average magnetization of a finite-size system of spin-1/2 particles encoded in an array of 171Yb+ atomic ions, we observe experimental evidence for many-body dephasing [2]. The properties of the system are closely related to that of an integrable Hamiltonian with a uniform spin-spin coupling, which enables approximate 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. [1] H. B. Kaplan, et al., arXiv: 2001.02477 (2020). [2] T.Kiendl, F.Marquardt, Phys. Rev. Lett. 118, 130601 (2017)

*This work is supported by the NSF STAQ program, the NSF QIS and Physics Frontier Center at JQI, AFOSR and ARO MURI programs, the DARPA DRINQS program, and the DOE BES and HEP programs.

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Authors

  • Wen Lin Tan

    • Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park

  • Harvey B. Kaplan

    • Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park
    • JQI, University of Maryland

  • Arinjoy De

    • Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park
    • JQI, University of Maryland

  • Guido Pagano

    • Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park

  • Christopher Monroe

    • Joint Quantum Institute, University of Maryland, College Park
    • Joint Quantum Institute, Department of Physics and Joint Center for Quantum Information and Computer Science, University of Maryland, College Park
    • JQI, University of Maryland

  • Lingzhen Guo

    • Max Planck Institute for the Science of Light

  • Florian Marquardt

    • Max Planck Institute for the Science of Light