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Landau-Zener-Stückelberg interference of microwave-dressed states of a superconducting phase qubit

Guozhu Sun, Xueda Wen, Bo Mao, Yang Yu, Jian Chen, Weiwei Xu, Lin Kang, Peiheng Wu, and Siyuan Han
Phys. Rev. B 83, 180507(R) – Published 26 May 2011
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Abstract

We present the observation of Landau-Zener-Stückelberg (LZS) interference of the dressed states arising from an artificial atom, a superconducting phase qubit, interacting with a microwave field. The dependence of LZS interference fringes on various external parameters and the initial state of the qubit agrees quantitatively very well with the theoretical prediction. Such LZS interferometry between the dressed states enables us to control the quantum states of a tetrapartite solid-state system with ease, demonstrating the feasibility of implementing efficient multipartite quantum logic gates with this unique approach.

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  • Received 1 April 2011

DOI:https://doi.org/10.1103/PhysRevB.83.180507

©2011 American Physical Society

Authors & Affiliations

Guozhu Sun1,2,3,*, Xueda Wen3, Bo Mao2, Yang Yu3, Jian Chen3, Weiwei Xu1,3, Lin Kang1,3, Peiheng Wu1,3, and Siyuan Han2,†

  • 1Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
  • 2Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA
  • 3National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China

  • *gzsun@nju.edu.cn
  • †han@ku.edu

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Vol. 83, Iss. 18 — 1 May 2011

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