Tunable Coupling Architecture for Fixed-Frequency Transmon Superconducting Qubits
J. Stehlik, D. M. Zajac, D. L. Underwood, T. Phung, J. Blair, S. Carnevale, D. Klaus, G. A. Keefe, A. Carniol, M. Kumph, Matthias Steffen, O. E. Dial
DOI 10.1103/PhysRevLett.127.080505 · 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
Implementation of high-fidelity 2-qubit operations is a key ingredient for scalable quantum error correction. In superconducting qubit architectures, tunable buses have been explored as a means to higher-fidelity gates. However, these buses introduce new pathways for leakage. Here we present a modified tunable bus architecture appropriate for fixed-frequency qubits in which the adiabaticity restrictions on gate speed are reduced. We characterize this coupler on a range of 2-qubit devices, achieving a maximum gate fidelity of 99.85%. We further show the calibration is stable over one day.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Tunable and switchable coupling between two superconducting resonators
similarity 0.96A. Baust et al.
Source status unknown — claims are unverified
Superconducting Switch for Fast On-Chip Routing of Quantum Microwave Fields
similarity 0.96M. Pechal et al.
Source status unknown — claims are unverified
Spin-wave-based tunable coupler between superconducting flux qubits
similarity 0.96Shaojie Yuan et al.
Source status unknown — claims are unverified
Shedding light on topological superconductors
similarity 0.94K. H. A. Villegas et al.
Source status unknown — claims are unverified
ac Long-Range Phase-Coherent Effects in Mesoscopic Superconductor–Normal Metal Structures
similarity 0.94Anatoly F. Volkov & Hideaki Takayanagi
Source status unknown — claims are unverified
Strong Coupling of a Spin Ensemble to a Superconducting Resonator
similarity 0.94Y. Kubo et al.
Source status unknown — claims are unverified