Nonlinear resonant behavior of a dispersive readout circuit for a superconducting flux qubit
Janice C. Lee, William D. Oliver, Karl K. Berggren, T. P. Orlando
DOI 10.1103/PhysRevB.75.144505 · Physical Review B
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
A nonlinear resonant circuit comprising a SQUID magnetometer and a shunting capacitor is studied as a readout scheme for a persistent-current qubit. The flux state of the qubit is detected as a change in the Josephson inductance of the SQUID magnetometer, which in turn mediates a shift in the resonant frequency of the readout circuit. The nonlinearity and resulting hysteresis in the resonant behavior are characterized as a function of the power of both the input drive and the associated resonance-peak response. Numerical simulations based on a nonlinear circuit model shows that the observed nonlinearity is dominated by the effect due to an ac flux rather than current bias through the Josephson inductor.
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
Anomalous charge noise in superconducting qubits
similarity 0.95B. G. Christensen et al.
Source status unknown — claims are unverified
Resonant and off-resonant microwave signal manipulation in coupled superconducting resonators
similarity 0.95Mathieu Pierre et al.
Source status unknown — claims are unverified
Resonant Readout of a Persistent Current Qubit
similarity 0.95Janice C. Lee et al. · 2005 · arXiv:cond-mat/0501283
Source status unknown — claims are unverified
dc measurements of macroscopic quantum levels in a superconducting qubit structure with a time-ordered meter
similarity 0.95D. S. Crankshaw et al.
Source status unknown — claims are unverified
Measuring a Quantum Dot with an Impedance-Matching On-Chip Superconducting LC Resonator at Gigahertz Frequencies
similarity 0.95M.-C. Harabula et al.
Source status unknown — claims are unverified
Tunable and switchable coupling between two superconducting resonators
similarity 0.94A. Baust et al.
Source status unknown — claims are unverified