Recovery Dynamics of a Gap-Engineered Transmon after a Quasiparticle Burst
Heekun Nho, Thomas Connolly, Pavel D. Kurilovich, Spencer Diamond, Charlotte G. L. Bøttcher, Leonid I. Glazman, Michel H. Devoret
DOI 10.1103/ql6q-wfpn · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Ionizing radiation impacts create bursts of quasiparticle density in superconducting qubits. These bursts temporarily degrade qubit coherence, which can be detrimental for quantum error correction. Here, we experimentally resolve quasiparticle bursts in 3D gap-engineered transmon qubits by continuously monitoring qubit transitions. Gap engineering allows us to reduce the burst detection rate by a factor of 5. This reduction falls 4 orders of magnitude short of that expected if the quasiparticles were to quickly thermalize to the cryostat temperature. We associate the limited effect of gap engineering with the slow thermalization of the phonons in our chips after the burst.
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 |
Similar papers
Resisting High-Energy Impact Events through Gap Engineering in Superconducting Qubit Arrays
similarity 0.94Matt McEwen et al.
Source status unknown — claims are unverified
Efficiency of quasiparticle evacuation in superconducting devices
similarity 0.93Sukumar Rajauria et al.
Source status unknown — claims are unverified
Evaluating the contribution of slow recombination in localized subgap states to the excess quasiparticle population in ordered superconductors
similarity 0.93Eva Gurra et al.
Source status unknown — claims are unverified
Measurement of energy decay in superconducting qubits from nonequilibrium quasiparticles
similarity 0.92M. Lenander et al.
Source status unknown — claims are unverified
Charge transport and Zener tunneling in small Josephson junctions with dissipation
similarity 0.92L. S. Kuzmin et al.
Source status unknown — claims are unverified
Hot Nonequilibrium Quasiparticles in Transmon Qubits
similarity 0.92K. Serniak et al.
Source status unknown — claims are unverified