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Hybrid quantum circuit consisting of a superconducting flux qubit coupled to a spin ensemble and a transmission-line resonator

机译:混合量子电路,由耦合至自旋系的超导通量量子位和传输线谐振器组成

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摘要

We propose an experimentally realizable hybrid quantum circuit for achieving a strong coupling between a spin ensemble and a transmission-line resonator via a superconducting flux qubit used as a data bus. The resulting coupling can be used to transfer quantum information between the spin ensemble and the resonator. In particular, in contrast to the direct coupling without a data bus, our approach requires far less spins to achieve a strong coupling between the spin ensemble and the resonator (e.g., three to four orders of magnitude less). This proposed hybrid quantum circuit could enable a long-time quantum memory when storing information in the spin ensemble, and allows the possibility to explore nonlinear effects in the ultrastrong-coupling regime.
机译:我们提出了一种可通过实验实现的混合量子电路,该电路可通过用作数据总线的超导通量量子位来实现自旋系综和传输线谐振器之间的强耦合。产生的耦合可用于在自旋系综和谐振器之间传输量子信息。特别地,与没有数据总线的直接耦合相反,我们的方法需要很少的自旋以实现自旋系综和谐振器之间的强耦合(例如,少三到四个数量级)。当在自旋集合中存储信息时,该拟议的混合量子电路可以实现长时间的量子存储,并允许探索超强耦合机制中的非线性效应。

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  • 来源
    《Physical review》 |2013年第14期|144516.1-144516.9|共9页
  • 作者单位

    Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China,Advanced Science Institute, RIKEN, Saitama 351-0198, Japan;

    Advanced Science Institute, RIKEN, Saitama 351-0198, Japan;

    Institute of Microelectronics and Tsinghua National Laboratory of Information Science and Technology, Tsinghua University, Beijing 100084, China,Beijing Computational Science Research Center, Beijing 100084, China;

    Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China,Advanced Science Institute, RIKEN, Saitama 351-0198, Japan,Beijing Computational Science Research Center, Beijing 100084, China;

    Advanced Science Institute, RIKEN, Saitama 351-0198, Japan,Department of Physics, The University of Michigan, Ann Arbor, Michigan 48109, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    superconducting logic elements and memory devices; microelectronic circuits; cavity quantum electrodynamics; micromasers; quantum computation; color centers and other defects;

    机译:超导逻辑元件和存储设备;微电子电路;腔量子电动力学微型激光器量子计算色心和其他缺陷;

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