Drastically suppressing the error of ballistic readout of qubits

Andrey L. Pankratov; Anna V. Gordeeva; Leonid S. Kuzmin

doi:10.1103/physrevlett.109.087003

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arXiv · 1112.2805

Drastically suppressing the error of ballistic readout of qubits

Andrey L. Pankratov·Anna V. Gordeeva·Leonid S. Kuzmin

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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.

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Andrey L. Pankratov, Anna V. Gordeeva, Leonid S. Kuzmin. 2011-12-13. Drastically suppressing the error of ballistic readout of qubits. https://doi.org/10.1103/physrevlett.109.087003

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