RF-driven Josephson bifurcation amplifier for quantum measurement

被引：298

作者：

Siddiqi, I ^{[1
]}

Vijay, R

Pierre, F

Wilson, CM

Metcalfe, M

Rigetti, C

Frunzio, L

Devoret, MH

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 20期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.207002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have constructed a new type of amplifier whose primary purpose is the readout of superconducting quantum bits. It is based on the transition of a rf-driven Josephson junction between two distinct oscillation states near a dynamical bifurcation point. The main advantages of this new amplifier are speed, high sensitivity, low backaction, and the absence of on-chip dissipation. Pulsed microwave reflection measurements on nanofabricated Al junctions show that actual devices attain the performance predicted by theory.

引用

收藏

页码：207002 / 1

页数：4

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