Heralded State Preparation in a Superconducting Qubit
J. E. Johnson, C. Macklin, D. H. Slichter, R. Vijay, E. B. Weingarten, John Clarke, I. Siddiqi
DOI 10.1103/PhysRevLett.109.050506 · 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
We demonstrate high-fidelity, quantum nondemolition, single-shot readout of a superconducting flux qubit in which the pointer state distributions can be resolved to below one part in 1000. In the weak excitation regime, continuous measurement permits the use of heralding to ensure initialization to a fiducial state, such as the ground state. This procedure boosts readout fidelity to 93.9% by suppressing errors due to spurious thermal population. Furthermore, heralding potentially enables a simple, fast qubit reset protocol without changing the system parameters to induce Purcell relaxation.
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
Parametric Control of a Superconducting Flux Qubit
similarity 0.96S. Saito et al.
Source status unknown — claims are unverified
Tunable Superconducting Flux Qubits with Long Coherence Times
similarity 0.95T. Chang et al.
Source status unknown — claims are unverified
Active initialization experiment of a superconducting qubit using a quantum circuit refrigerator
similarity 0.95Teruaki Yoshioka et al.
Source status unknown — claims are unverified
Spectroscopy on Two Coupled Superconducting Flux Qubits
similarity 0.95J. B. Majer et al.
Source status unknown — claims are unverified
Dephasing of a Superconducting Qubit Induced by Photon Noise
similarity 0.95P. Bertet et al.
Source status unknown — claims are unverified
Dispersive measurements of superconducting qubit coherence with a fast latching readout
similarity 0.95I. Siddiqi et al.
Source status unknown — claims are unverified