RF-driven Josephson bifurcation amplifier for quantum measurement

被引：295
|
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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