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Probing many-body dynamics on a 51-atom quantum simulator

机译：在51原子量子模拟器上探测多体动力学

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摘要

Controllable, coherent many-body systems can provide insights into the fundamental properties of quantum matter, enable the realization of new quantum phases and could ultimately lead to computational systems that outperform existing computers based on classical approaches. Here we demonstrate a method for creating controlled many-body quantum matter that combines deterministically prepared, reconfigurable arrays of individually trapped cold atoms with strong, coherent interactions enabled by excitation to Rydberg states. We realize a programmable Ising-type quantum spin model with tunable interactions and system sizes of up to 51 qubits. Within this model, we observe phase transitions into spatially ordered states that break various discrete symmetries, verify the high-fidelity preparation of these states and investigate the dynamics across the phase transition in large arrays of atoms. In particular, we observe robust manybody dynamics corresponding to persistent oscillations of the order after a rapid quantum quench that results from a sudden transition across the phase boundary. Our method provides a way of exploring many-body phenomena on a programmable quantum simulator and could enable realizations of new quantum algorithms.
机译：可控的，连贯的多体系统可以洞悉量子物质的基本属性，实现新的量子相，并最终导致计算系统的性能超越基于经典方法的现有计算机。在这里，我们演示了一种创建受控多体量子物质的方法，该方法将确定性准备的，可重新配置的单个捕获的冷原子阵列与激发到里德堡态的强相干相互作用相结合。我们实现了具有可调相互作用和高达51量子位的系统大小的可编程Ising型量子自旋模型。在此模型中，我们观察到相态转变成打破各种离散对称性的空间有序状态，验证了这些状态的高保真准备，并研究了大原子阵列中整个相变的动力学。特别是，我们观察到了强大的多体动力学，该动力学对应于快速量子猝灭后的阶次持续振荡，该快速量子猝灭是由跨越相界的突然跃迁导致的。我们的方法提供了一种在可编程量子模拟器上探索多体现象的方法，并且可以实现新的量子算法。

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  • 来源
    《Nature》 |2017年第7682期|579-584|共6页
  • 作者

    Bernien Hannes; Schwartz Sylvain; Keesling Alexander; Levine Harry; Omran Ahmed; Pichler Hannes; Choi Soonwon; Zibrov Alexander S.; Endres Manuel; Greiner Markus; Vuletic Vladan; Lukin Mikhail D.;

  • 作者单位

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA|MIT, Dept Phys, Cambridge, MA 02139 USA|MIT, Res Lab Elect, 77 Massachusetts Ave, Cambridge, MA 02139 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA|Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom Mol & Opt Phys, 60 Garden St, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

    MIT, Dept Phys, Cambridge, MA 02139 USA|MIT, Res Lab Elect, 77 Massachusetts Ave, Cambridge, MA 02139 USA;

    Harvard Univ, Dept Phys, Cambridge, MA 02138 USA;

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