Quantum Interference Induced by Landau-Zener Transition in Strongly Driven Flux Qubits

ORAL

Abstract

We irradiate superconducting flux qubits with strong microwaves. Quantum interference patterns corresponding to the population transitions between discrete macroscopic quantum states were observed. The interference patterns, which depend on the microwave frequency and power, are complicated because of the short decoherence time. An analytical model based on Landau-Zener transition is developed to quantitatively describe the interference patterns. This work is partially supported by NSFC (10704034, 10725415), the State Key Program for Basic Research of China (2006CB921801).

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Authors

  • Yang Yu

    • National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China

  • Yiwen Wang

    • National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China

  • Xueda Wen

    • National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China

  • Guozhu Sun

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Shanhua Cong

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Jian Chen

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Lin Kang

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Weiwei Xu

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Peiheng Wu

    • Research Institute of Superconductor Electronics, Department of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China

  • Siyuan Han

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