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Programable two-qubit gates in capacitively coupled flopping-mode spin qubits

机译:可编程的双量标门,电容耦合的开牌模式旋转QUBITS

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摘要

Recent achievements in the field of gate-defined semiconductor quantum dots reinforce the concept of a spin-based quantum computer consisting of nodes of locally connected qubits which communicate with each other via superconducting circuit resonator photons. In this paper, we theoretically demonstrate a versatile set of quantum gates between adjacent spin qubits defined in semiconductor quantum dots situated within the same node of such a spin-based quantum computer. The electric dipole acquired by the spin of an electron that moves across a double quantum dot potential in a magnetic field gradient has enabled strong coupling to resonator photons and low-power spin control. Here we show that this flopping-mode spin qubit also provides the tunability to program multiple two-qubit gates. Since the capacilive coupling between these qubits brings about additional dephasing, we calculate the estimated infidelity of different two-qubit gates in the most immediate possible experimental realizations.
机译:最近在门定义半导体量子点领域的成就加强了由局部连接的Qubits的节点组成的基于旋转的量子计算机的概念,该古迹通过超导电路谐振器光子彼此通信。在本文中,理论上,我们展示了位于基于自旋基量子计算机的同一节点内的半导体量子点中定义的相邻自旋Qubits之间的多功能量子栅极。通过跨越磁场梯度在双量子点电位上移动的电子旋转的电偶极器使得能够使强耦合到谐振器光子和低功率自旋控制。在这里,我们表明,该开盘模式SpinQubit还提供了用于编程多个双态栅栏的可调性。由于这些贵族之间的电容耦合产生了额外的去除,因此我们在最直接可能的实验性实现中计算不同双量标栅极的估计的不同。

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  • 来源
    《Physical review》 |2020年第19期|195438.1-195438.8|共8页
  • 作者单位

    Department of Physics and Astronomy Uppsala University Box 516. S-751 20 Uppsala Sweden Department of Physics University of Konstanz D-78457 Konstanz Germany;

    Department of Physics University of Konstanz D-78457 Konstanz Germany;

    Department of Physics University of Konstanz D-78457 Konstanz Germany;

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