Spectroscopy of energy-level splitting between two macroscopic quantum states of charge coherently superposed by Josephson coupling

被引：194

作者：

Nakamura, Y

Chen, CD

Tsai, JS

机构：

[1] NEC Fundamental Research Laboratories, Ibaraki, 305, Tsukuba

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.79.2328

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study Cooper-pair tunneling in a voltage-biased superconducting single-electron transistor under microwave irradiation. By tracing the peak positions of a photon-assisted Josephson-quasiparticle current as a function of the microwave frequency, we observe an energy-dispersion curve in the quasicharge space. This shows that energy-level splitting occurs between two macroscopic quantum states of charge coherently superposed by Josephson coupling.

引用

页码：2328 / 2331

页数：4

共 20 条

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