Coexistence of Nonequilibrium Density and Equilibrium Energy Distribution of Quasiparticles in a Superconducting Qubit
Thomas Connolly, Pavel D. Kurilovich, Spencer Diamond, Heekun Nho, Charlotte G. L. Bøttcher, Leonid I. Glazman, Valla Fatemi, Michel H. Devoret
DOI 10.1103/PhysRevLett.132.217001 · 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
The density of quasiparticles typically observed in superconducting qubits exceeds the value expected in equilibrium by many orders of magnitude. Can this out-of-equilibrium quasiparticle density still possess an energy distribution in equilibrium with the phonon bath? Here, we answer this question affirmatively by measuring the thermal activation of charge-parity switching in a transmon qubit with a difference in superconducting gap on the two sides of the Josephson junction. We then demonstrate how the gap asymmetry of the device can be exploited to manipulate its parity.
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
Dynamics of parametric fluctuations induced by quasiparticle tunneling in superconducting flux qubits
similarity 0.97M. Bal et al.
Source status unknown — claims are unverified
Quasiparticle Relaxation of Superconducting Qubits in the Presence of Flux
similarity 0.97G. Catelani et al.
Source status unknown — claims are unverified
Strong Tunable Coupling between a Superconducting Charge and Phase Qubit
similarity 0.96A. Fay et al.
Source status unknown — claims are unverified
Normal-metal quasiparticle traps for superconducting qubits
similarity 0.96R.-P. Riwar et al.
Source status unknown — claims are unverified
Parametric Control of a Superconducting Flux Qubit
similarity 0.96S. Saito et al.
Source status unknown — claims are unverified
Phase coherent dynamics of a superconducting flux qubit with capacitive bias readout
similarity 0.96F. Deppe et al.
Source status unknown — claims are unverified