A quantum-classical hybrid variational algorithm using trapped ions

POSTER

Abstract

Trapped atomic ions are an excellent platform for probing dynamics of many-body systems, allowing the study of quantum magnetism models both in equilibrium and after a quantum quench. We use chains of 171Yb$+$ ions confined in a rf Paul trap to simulate the transverse field Ising model with tunable long-range interactions, generated with spin-dependent optical dipole forces. Experiments are run in two quantum simulators operating at room and cryogenic temperature, respectively. Our platform is used to implement Quantum approximate optimization algorithms [1] and to study confinement of low-energy quasi-particles after a quantum quench [2]. [1] Farhi \textit{et al}, arXiv:1602.07674 [quant-ph] [2] Liu \textit{et al, }arXiv:1810.02365 [cond-mat.quant-gas]

Authors

  • Antonios Kyprianidis

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

  • G. Pagano

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

  • Patrick Becker

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

  • Kate Collins

    JQI, NIST/University of Maryland, College Park, MD 20742, USA, University of Maryland Department of Physics and NIST

  • H.B. Kaplan

    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

  • Aniruddha Bapat

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

  • Lucas Brady

    QuICS, NIST/University of Maryland, College Park, MD 20742, USA

  • Alexey V. Gorshkov

    Joint Quantum Institute, JQI, NIST/University of Maryland, College Park, MD 20742, USA and QuICS, NIST/University of Maryland, College Park, MD 20742, USA

  • Stephen Jordan

    QuICS, NIST/University of Maryland, College Park, MD 20742, USA and NIST, Gaithersburg, MD 20899, USA

  • Christopher Monroe

    JQI, NIST/University of Maryland, College Park, MD 20742, USA and IonQ, College Park, MD 20740