Confined Dynamics of a Linear Spin Chain After a Quench using a Trapped Ion Quantum Simulator

ORAL

Abstract

Trapped-ion quantum simulators are pristine quantum platforms to investigate out-of-equilibrium many-body systems. Here we report an experimental study of the dynamics in a transverse field Ising model with tunable long range interactions after a quantum quench [1, 2]. We observe a regime in which the spreading of correlations is bounded and the magnetization dynamics is a direct probe of~low energy quasi-particle excitation~confinement [3].~The experiment is explained using a `two kink' model, which considers a linear spin chain with only two domain walls [4]. We plan to extend this experiment by looking directly at spin correlation propagation and to look at finite size scaling effects by performing the experiment with longer ion chains. [1] P. Richerme, et al, \textit{Nature}~\textbf{volume511},~pages198--201~(10 July 2014) [2] J. Zhang, et al,\textit{ Nature}~\textbf{volume551},~pages601--604~(30 November 2017) [3] M. Kormos, et al,\textit{ Nature Physics}~\textbf{volume13},~pages246--249~(2017) [4] F. Liu, et al, arXiv:1810.02365

*This work is supported by the DARPA program on Driven and Nonequilibrium Quantum Systems, the DOE program on Quantum Computing in Chemical and Material Sciences, the AFOSR MURI on Quantum Measurement and Verification, and the NSF Physics Frontier Center at JQI

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Authors

  • H.B. Kaplan

    • JQI, NIST/University of Maryland, College Park, MD 20742, USA
    • JQI, University of Maryland

  • G. Pagano

    • JQI, NIST/University of Maryland, College Park, MD 20742, USA
    • JQI, University of Maryland

  • W.L. Tan

    • JQI, NIST/University of Maryland, College Park, MD 20742, USA
    • JQI, University of Maryland

  • F. Liu

    • JQI, University of Maryland

  • A.V. Gorshkov

    • JQI, University of Maryland

  • Christopher Monroe

    • Joint Quantum Institute and University of Maryland
    • JQI, University of Maryland
    • Joint Quantum Institute, University of Maryland Department of Physics, College Park 20742