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arXiv 2102.08169cond-mat.mes-hall
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微波共振腔探测双量子点的激发态光谱

Microwave-resonator-detected excited-state spectroscopy of a double quantum dot

Ming-Bo Chen, Shun-Li Jiang, Ning Wang, Bao-Chuan Wang, Ting Lin, Si-Si Gu, Hai-Ou Li, Gang Cao, Guo-Ping Guo

摘要:

作为电路量子电动力学(cQED)耦合系统的一个应用,超导谐振器在超导-半导体混合结构的高灵敏度测量中发挥着重要作用。利用高阻抗NbTiN谐振腔,通过在GaAs双量子点(DQD)的一个栅电极上施加电压脉冲,对DQD进行了激发态光谱研究。脉冲训练调制DQD能量失谐,并在零失谐处引起电荷态跃迁。利用共振腔的灵敏度,我们根据泡利不相容原理在能谱中区分了不同的自旋态跃迁。此外,我们实验研究如何interdot隧穿率修改的谐振腔响应。实验结果与基于我们模型的模拟光谱相一致。

英文摘要:

As an application in circuit quantum electrodynamics (cQED) coupled systems, superconducting resonators play an important role in high-sensitivity measurements in a superconductingsemiconductor hybrid architecture. Taking advantage of a high-impedance NbTiN resonator, we perform excited-state spectroscopy on a GaAs double quantum dot (DQD) by applying voltage pulses to one gate electrode. The pulse train modulates the DQD energy detuning and gives rise to charge state transitions at zero detuning. Benefiting from the outstanding sensitivity of the resonator, we distinguish different spin-state transitions in the energy spectrum according to the Pauli exclusion principle. Furthermore, we experimentally study how the interdot tunneling rate modifies the resonator response. The experimental results are consistent with the simulated spectra based on our model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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