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Trapped Ion Quantum Computing Superconducting Qubits

Suppression of dephasing by qubit motion in superconducting circuits

arXiv
Authors: D. V. Averin, K. Xu, Y. P. Zhong, C. Song, H. Wang, Siyuan Han

Year

2015

Paper ID

27512

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

We suggest and demonstrate a protocol which suppresses dephasing due to the low-frequency noise by qubit motion, i.e., transfer of the logical qubit of information in a system of n geq 2 physical qubits. The protocol requires only the nearest-neighbor coupling and is applicable to different qubit structures. We further analyze its effectiveness against noises with arbitrary correlations. Our analysis, together with experiments using up to three superconducting qubits, shows that for the realistic uncorrelated noises, qubit motion increases the dephasing time of the logical qubit as sqrt{n}. In general, the protocol provides a diagnostic tool to measure the noise correlations.

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  • We suggest and demonstrate a protocol which suppresses dephasing due to the low-frequency noise by qubit motion, i.e., transfer of the logical qubit of information in a system...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1509.00122 [2] arXiv https://arxiv.org/abs/1509.00122 [3] Publisher https://arxiv.org/abs/1509.00122

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