Observation of the correspondence between Landau-Zener transition and Kibble-Zurek mechanism with a superconducting qubit system

ORAL

Abstract

We present a direct experimental observation of the correspondence between Landau-Zener transition and Kibble-Zurek mechanism with a superconducting qubit system. We develop a time resolved approach to study quantum dynamics of the Landau-Zener transition. By using this method, we observe the key features of the correspondence between Landau-Zener transition and Kibble-Zurek mechanism, e.g., the boundary between the adiabatic and impulse regions, the freeze out phenomenon in the impulse region. Remarkably, the scaling behavior of the population in the excited state, an analogical phenomenon originally predicted in Kibble-Zurek mechanism, is also observed in the Landau-Zener transition.

*This work was partly supported by the SKPBR of China (2011CB922104), NSFC (91321310, 11125417, 11474153, 11474154, 61521001), and the PCSIRT (Grant No. IRT1243)

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Authors

  • Ming Gong

    • School of Physics, Nanjing University, China

  • Dong Lan

    • School of Physics, Nanjing University, China

  • Yuhao Liu

    • School of Physics, Nanjing University, China

  • Xinsheng Tan

    • School of Physics, Nanjing University, China

  • Haifeng Yu

    • School of Physics, Nanjing University, China

  • Yang Yu

    • School of Physics, Nanjing University, China

  • Shiliang Zhu

    • School of Physics, Nanjing University, China

  • Guozhu Sun

    • School of Electronic Science and Engineering, Nanjing University, China

  • Yu Zhou

    • School of Electronic Science and Engineering, Nanjing University, China

  • Yunyi Fan

    • School of Electronic Science and Engineering, Nanjing University, China

  • Peiheng Wu

    • School of Electronic Science and Engineering, Nanjing University, China

  • Xueda Wen

    • Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

  • Danwei Zhang

    • Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, SPTE, South China Normal University, Guangzhou 510006, China

  • Siyuan Han

    • Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA