Decoherence in Josephson Phase Qubits from Junction Resonators
R. W. Simmonds, K. M. Lang, D. A. Hite, S. Nam, D. P. Pappas, John M. Martinis
DOI 10.1103/PhysRevLett.93.077003 · 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
Although Josephson junction qubits show great promise for quantum computing, the origin of dominant decoherence mechanisms remains unknown. Improving the operation of a Josephson junction based phase qubit has revealed microscopic two-level systems or resonators within the tunnel barrier that cause decoherence. We report spectroscopic data that show a level splitting characteristic of coupling between a two-state qubit and a two-level system. Furthermore, we show Rabi oscillations whose “coherence amplitude” is significantly degraded by the presence of these spurious microwave resonators. The discovery of these resonators impacts the future of Josephson qubits as well as existing Josephson technologies.
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
Temperature Dependence of Coherent Oscillations in Josephson Phase Qubits
similarity 0.97J. Lisenfeld et al.
Source status unknown — claims are unverified
Evidence for coherent quantum phase slips across a Josephson junction array
similarity 0.97Vladimir E. Manucharyan et al.
Source status unknown — claims are unverified
Emission and Absorption Asymmetry in the Quantum Noise of a Josephson Junction
similarity 0.96P.-M. Billangeon et al.
Source status unknown — claims are unverified
Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction
similarity 0.96Matilda Peruzzo et al.
Source status unknown — claims are unverified
Quantum Phase Transition in One-Dimensional Arrays of Resistively Shunted Small Josephson Junctions
similarity 0.96Hisao Miyazaki et al.
Source status unknown — claims are unverified
Low-bandwidth control scheme for an oscillator-stabilized Josephson qubit
similarity 0.96R. H. Koch et al.
Source status unknown — claims are unverified