Drastically suppressing the error of ballistic readout of qubits

Abstract

The thermal jitter of transmission of magnetic flux quanta in long Josephson junctions is studied. While for large-to-critical damping and small values of bias current the physically obvious dependence of the jitter versus length $\sigma \sim \sqrt{L}$ is confirmed, for small damping starting from the experimentally relevant $\alpha =0.03$ and below strong deviation from $\sigma \sim \sqrt{L}$ is observed, up to nearly complete independence of the jitter versus length, which is exciting from fundamental point of view, but also intriguing from the point of view of possible applications.

4 pages, 6 figures

References in corpus (4)

• Quantum state engineering with Josephson-junction devices
• Suppression of timing errors in short overdamped Josephson junctions
• Rapid Ballistic Readout for Flux Qubits
• Reading-out the state of a flux qubit by Josephson transmission line solitons

Cited by in corpus (9)

• Switching times in long-overlap Josephson junctions subject to thermal fluctuations and non-Gaussian noise sources
• Lévy noise effects on Josephson junctions
• Soliton scattering as a measurement tool for weak signals
• Supratransmission-induced travelling breathers in long Josephson junctions
• Thermal flux-flow regime in long Josephson tunnel junctions
• Asynchronous Reversible Computing Unveiled Using Ballistic Shift Registers
• Effects of correlated noise on the excitation of robust breathers in an ac-driven, lossy sine-Gordon system
• Axion field influence on Josephson junction quasipotential
• Simulation of a rapid qubit readout dependent on the transmission of a single fluxon