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arXiv 0712.0845cond-mat.mes-hallcond-mat.supr-con
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低频噪声下的宏观谐振调谐

Macroscopic Resonant Tunneling in the Presence of Low Frequency Noise

M. H. S. Amin, Dmitri V. Averin

摘要:

本文提出了一种双势阱中磁通的宏观共振隧穿理论。阱之间的非相干通量隧穿速率呈现共振峰,其形状和位置反映了噪声的定性特征,因此可以作为研究SQUID量子比特中低频通量噪声的诊断工具。我们表明,特别是,噪声引起的重整化的第一个共振峰提供了直接的信息的噪声源的温度和其量子分量的强度。

英文摘要:

We develop a theory of macroscopic resonant tunneling of flux in a double-well potential in the presence of realistic flux noise with significant low-frequency component. The rate of incoherent flux tunneling between the wells exhibits resonant peaks, the shape and position of which reflect qualitative features of the noise, and can thus serve as a diagnostic tool for studying the low-frequency flux noise in SQUID qubits. We show, in particular, that the noise-induced renormalization of the first resonant peak provides direct information on the temperature of the noise source and the strength of its quantum component.

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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