Electron-phonon interactions in the Andreev Bound States of aluminum nanobridge Josephson junctions

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 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.

References in corpus (29)

• Correlated Charge Noise and Relaxation Errors in Superconducting Qubits
• Coherent manipulation of Andreev states in superconducting atomic contacts
• Nonequilibrium quasiparticles and $2e$ periodicity in single-Cooper-pair transistors
• Loss and decoherence due to stray infrared light in superconducting quantum circuits
• Impact of ionizing radiation on superconducting qubit coherence
• Hot non-equilibrium quasiparticles in transmon qubits
• Protecting superconducting qubits from external sources of loss and heat
• Coherent manipulation of an Andreev spin qubit
• Number fluctuations of sparse quasiparticles in a superconductor
• Direct microwave measurement of Andreev-bound-state dynamics in a proximitized semiconducting nanowire
• Reducing the impact of radioactivity on quantum circuits in a deep-underground facility
• Measurements of Quasiparticle Tunneling Dynamics in a Bandgap-Engineered Transmon Qubit
• Evidence for long-lived quasiparticles trapped in superconducting point contacts
• Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits
• Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons
• Phonon traps reduce the quasiparticle density in superconducting circuits
• Normal-metal quasiparticle traps for superconducting qubits
• Engineering superconducting qubits to reduce quasiparticles and charge noise
• Approaching ideal weak link behavior with three dimensional aluminum nanobridges
• Dynamics of quasiparticle trapping in Andreev levels
• Single Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions
• Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor
• A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor
• Optimizing Anharmonicity in Nanoscale Weak Link Josephson Junction Oscillators
• Distinguishing parity-switching mechanisms in a superconducting qubit
• Nonlinear microwave response of aluminum weak-link Josephson oscillators
• Kinetics of quasiparticle trapping in a Cooper-pair box
• Mitigation of quasiparticle loss in superconducting qubits by phonon scattering
• Continuous Real-Time Detection of Quasiparticle Trapping in Aluminum Nanobridge Josephson Junctions