Electron-phonon interactions in the Andreev bound states of aluminum nanobridge Josephson junctions
Electron-phonon interactions in the Andreev bound states of aluminum nanobridge Josephson junctions
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DOI：
10.1103/physrevb.107.l140506
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发表时间：
2022-11
影响因子：
3.7
通讯作者：
James T. Farmer;A. Zarassi;S. Shanto;D. Hartsell;E. Levenson-Falk
中科院分区：
文献类型：
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作者：
James T. Farmer;A. Zarassi;S. Shanto;D. Hartsell;E. Levenson-Falk
我们报告了连续测量的准粒子捕获和清除Andreev束缚态的铝纳米桥约瑟夫森结集成到一个超导量子比特类设备。我们发现，捕获是很好地模拟独立的自发辐射事件。高于80 mK的清除过程是很好地描述了热声子的吸收，但其他温度无关的机制在低温下占主导地位。我们发现复杂的结构中的Andreev束缚态能量的低温清除率的依赖。我们的结果揭示了准粒子的行为在量子比特类电路。
We report continuous measurements of quasiparticles trapping and clearing from Andreev Bound States in aluminum nanobridge Josephson junctions integrated into a superconducting-qubit-like device. We find that trapping is well modeled by independent spontaneous emission events. Above 80 mK the clearing process is well described by absorption of thermal phonons, but other temperature-independent mechanisms dominate at low temperature. We find complex structure in the dependence of the low-temperature clearing rate on the Andreev Bound State energy. Our results shed light on quasiparticle behavior in qubit-like circuits.