Suppression of Dephasing by Qubit Motion in Superconducting Circuits
Suppression of Dephasing by Qubit Motion in Superconducting Circuits
复制标题
超导电路中量子位运动对相移的抑制
DOI：
10.1103/physrevlett.116.010501
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发表时间：
2016-01-08
影响因子：
8.6
通讯作者：
Han, Siyuan
中科院分区：
文献类型：
--
作者：
Averin, D. V.;Xu, K.;Han, Siyuan
We suggest and demonstrate a protocol which suppresses the low-frequency dephasing by qubit motion, i.e., transfer of the logical qubit of information in a system of n >= 2 physical qubits. The protocol requires only the nearest-neighbor coupling and is applicable to different qubit structures. Our analysis of its effectiveness against noises with arbitrary correlations, 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 root n. In general, the protocol provides a diagnostic tool for measurements of the noise correlations.
