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首页> 外文期刊>Physical review >Broadband microwave spectroscopy of semiconductor nanowire-based Cooper-pair transistors
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Broadband microwave spectroscopy of semiconductor nanowire-based Cooper-pair transistors

机译：基于半导体纳米线的宽带微波光谱晶体管

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摘要

The Cooper-pair transistor (CPT), a small superconducting island enclosed between two Josephson weak links, is the atomic building block of various superconducting quantum circuits. Utilizing gate-tunable semiconductor channels as weak links, the energy scale associated with the Josephson tunneling can be changed with respect to the charging energy of the island, tuning the extent of its charge fluctuations. Here, we directly demonstrate this control by mapping the energy level structure of a CPT made of an indium arsenide nanowire with a superconducting aluminum shell. We extract the device parameters based on the exhaustive modeling of the quantum dynamics of the phase-biased nanowire CPT and directly measure the even-odd parity occupation ratio as a function of the device temperature, relevant for superconducting and prospective topological qubits.
机译：库珀 - 对晶体管（CPT）是两个约瑟夫森弱链路之间的小超导岛，是各种超导量子电路的原子构建块。利用栅极可调半导体通道作为弱链路，可以相对于岛的充电能量改变与Josephson隧道相关的能量刻度，调整其电荷波动的程度。这里，我们通过用超导铝壳将由砷化物纳米线制成的CPT的能量水平结构直接证明该控制。我们基于相位偏置纳米线CPT的量子动态的穷举建模提取设备参数，并直接测量偶数奇偶级占用比作为设备温度的函数，与超导和潜在拓扑QUBITS相关。

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  • 来源
    《Physical review》 |2019年第22期|220504.1-220504.6|共6页
  • 作者

    Proutski Alex; Laroche Dominique; van t Hooft Bas; Krogstrup Peter; Nygard Jesper; Kouwenhoven Leo P.; Geresdi Attila;

  • 作者单位

    Delft Univ Technol QuTech NL-2600 GA Delft Netherlands|Delft Univ Technol Kavli Inst Nanosci NL-2600 GA Delft Netherlands;

    Delft Univ Technol QuTech NL-2600 GA Delft Netherlands|Delft Univ Technol Kavli Inst Nanosci NL-2600 GA Delft Netherlands;

    Delft Univ Technol QuTech NL-2600 GA Delft Netherlands|Delft Univ Technol Kavli Inst Nanosci NL-2600 GA Delft Netherlands;

    Univ Copenhagen Niels Bohr Inst Microsoft Quantum Mat Lab Copenhagen DK-2100 Copenhagen Denmark|Univ Copenhagen Ctr Quantum Devices Niels Bohr Inst DK-2100 Copenhagen Denmark;

    Univ Copenhagen Ctr Quantum Devices Niels Bohr Inst DK-2100 Copenhagen Denmark;

    Delft Univ Technol QuTech NL-2600 GA Delft Netherlands|Delft Univ Technol Kavli Inst Nanosci NL-2600 GA Delft Netherlands|Microsoft Quantum Lab Delft NL-2600 GA Delft Netherlands;

    Delft Univ Technol QuTech NL-2600 GA Delft Netherlands|Delft Univ Technol Kavli Inst Nanosci NL-2600 GA Delft Netherlands;

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