Observation of High Coherence in Josephson Junction Qubits Measured in a Three-Dimensional Circuit QED Architecture
Hanhee Paik, D. I. Schuster, Lev S. Bishop, G. Kirchmair, G. Catelani, A. P. Sears, B. R. Johnson, M. J. Reagor, L. Frunzio, L. I. Glazman, S. M. Girvin, M. H. Devoret, R. J. Schoelkopf
DOI 10.1103/PhysRevLett.107.240501 · 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
Superconducting quantum circuits based on Josephson junctions have made rapid progress in demonstrating quantum behavior and scalability. However, the future prospects ultimately depend upon the intrinsic coherence of Josephson junctions, and whether superconducting qubits can be adequately isolated from their environment. We introduce a new architecture for superconducting quantum circuits employing a three-dimensional resonator that suppresses qubit decoherence while maintaining sufficient coupling to the control signal. With the new architecture, we demonstrate that Josephson junction qubits are highly coherent, with T2∼10 to 20 μs without the use of spin echo, and highly stable, showing no evidence for 1/f critical current noise. These results suggest that the overall quality of Josephson junctions in these qubits will allow error rates of a few 10−4, approaching the error correction threshold.
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
Coherence effects in double-barrier Josephson junctions
similarity 0.96A. Brinkman & A. A. Golubov
Source status unknown — claims are unverified
Electronic decoherence of two-level systems in a Josephson junction
similarity 0.96Alexander Bilmes et al.
Source status unknown — claims are unverified
Enhancement of the topological regime in elongated Josephson junctions
similarity 0.95D. Kuiri et al.
Source status unknown — claims are unverified
Decoherence in Josephson Phase Qubits from Junction Resonators
similarity 0.95R. W. Simmonds et al.
Source status unknown — claims are unverified
Circuit-QED-based measurement of vortex lattice order in a Josephson junction array
similarity 0.95R. Cosmic et al.
Source status unknown — claims are unverified
Temperature Dependence of Coherent Oscillations in Josephson Phase Qubits
similarity 0.95J. Lisenfeld et al.
Source status unknown — claims are unverified