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arXiv 0802.0353cond-mat.mes-hallcond-mat.supr-con
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Josephson电感耦合的超导电荷量子比特的光谱

Spectroscopy of superconducting charge qubits coupled by a Josephson inductance

T. Yamamoto, M. Watanabe, J. Q. You, Yu. A. Pashkin, O. Astafiev, Y. Nakamura, F. Nori, J. S. Tsai

摘要:

我们设计并实验实现了一个电感耦合超导电荷量子比特电路,其中约瑟夫森结用作电感,量子比特之间的耦合由外加的磁通量控制。电路上的光谱测量与理论计算符合得很好。我们观察到了反交叉,它起源于量子比特和约瑟夫森结的等离子体模之间的耦合。此外,反交叉的大小取决于外部磁通量,这表明耦合的可控性。

英文摘要:

We have designed and experimentally implemented a circuit of inductively-coupled superconducting charge qubits, where a Josephson junction is used as an inductance, and the coupling between the qubits is controlled by an applied magnetic flux. Spectroscopic measurements on the circuit are in good agreement with theoretical calculations. We observed anticrossings which originate from the coupling between the qubit and the plasma mode of the Josephson junction. Moreover, the size of the anticrossing depends on the external magnetic flux, which demonstrates the controllability of the coupling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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