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Greenberger-Horne-Zeilinger generation protocol for iV superconducting transmon qubits capacitively coupled to a quantum bus

机译:用于电容耦合到量子总线的iV超导transmon量子位的Greenberger-Horne-Zeilinger生成协议

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摘要

We propose a circuit quantum electrodynamics (QED) realization of a protocol to generate a Greenberger-Horne-Zeilinger (GHZ) state for N superconducting transmon qubits homogeneously coupled to a superconducting transmission line resonator in the dispersive limit. We derive an effective Hamiltonian with pairwise qubit exchange interactions of the XY type, g(XX + YY), that can be globally controlled. Starting from a separable initial state, these interactions allow us to generate a multi-qubit GHZ state within a time tGHz ~ g~(-1) • We discuss how to probe the nonlocal nature and the genuine N-partite entanglement of the generated state. Finally, we investigate the stability of the proposed scheme to inhomogeneities in the physical parameters.
机译:我们提出一种协议的电路量子电动力学(QED)实现,以生成N个超导跨子量子比特在分散极限内均匀耦合到超导传输线谐振器的Greenberger-Horne-Zeilinger(GHZ)状态。我们推导了一个有效的哈密顿量,它具有可全局控制的XY类型的成对量子位交换相互作用g(XX + YY)。从可分离的初始状态开始,这些相互作用使我们能够在tGHz〜g〜(-1)的时间内生成多量子比特的GHZ状态。•我们讨论了如何探究所生成状态的非局部性质和真正的N粒子纠缠。 。最后,我们研究了所提出方案对物理参数不均匀性的稳定性。

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  • 来源
    《Physical review》 |2011年第13期|p.134519.1-134519.8|共8页
  • 作者单位

    Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland;

    Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland,Department of Physics, McGill University, Montreal QC, Canada H3A 2T8;

    Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland;

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

    josephson devices; quantum computation;

    机译:约瑟夫森装置;量子计算;

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