Electron-phonon interactions in the Andreev bound states of aluminum nanobridge Josephson junctions
James T. Farmer, Azarin Zarassi, Sadman Shanto, Darian Hartsell, Eli M. Levenson-Falk
DOI 10.1103/PhysRevB.107.L140506 · Physical Review B
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Abstract
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 the absorption of thermal phonons, but other temperature-independent mechanisms dominate at low temperature. We find a 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 qubitlike circuits.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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