INFLUENCE OF CONTROLLED QUANTUM-MECHANICAL CHARGE AND PHASE FLUCTUATIONS ON JOSEPHSON TUNNELING

被引：35

作者：

MATTERS, M ^{[1
]}

ELION, WJ ^{[1
]}

MOOIJ, JE ^{[1
]}

机构：

[1] DELFT UNIV TECHNOL,DELFT INST MICROELECTR & SUBMICRON TECHNOL,2600 GA DELFT,NETHERLANDS

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.75.721

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the interplay of controlled quantum-mechanical charge and phase fluctuations by measuring their influence on the supercurrent through a small superconducting grain. The grain is connected to leads by two small Josephson tunnel junctions. The phase fluctuations are controlled by the magnetic flux threading a SQUID that connects the grain to a large superconductor. The charge fluctuations are modulated by a voltage on a gate capacitor. As a function of gate voltage we observe a broadening of the Coulomb resonance of the supercurrent for decreasing phase fluctuations, in agreement with theoretical predictions.

引用

页码：721 / 724

页数：4

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