Flux-driven Josephson parametric amplifier

被引：347

作者：

Yamamoto, T. ^{[1
,2
,3
]}

Inomata, K. ^{[2
]}

Watanabe, M. ^{[2
]}

Matsuba, K. ^{[3
,4
]}

Miyazaki, T. ^{[3
]}

Oliver, W. D. ^{[5
]}

Nakamura, Y. ^{[1
,2
]}

Tsai, J. S. ^{[1
,2
]}

机构：

[1] NEC Nano Elect Res Labs, Tsukuba, Ibaraki 3058501, Japan

[2] Inst Phys & Chem Res RIKEN, Emergent Mat Dept, Wako, Saitama 3510198, Japan

[3] CREST JST, Kawaguchi, Saitama 3320012, Japan

[4] Tokyo Inst Technol, Dept Mat Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[5] MIT, Lincoln Lab, Lexington, MA 02420 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 04期

关键词：

D O I：

10.1063/1.2964182

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a Josephson parametric amplifier comprising a superconducting coplanar-waveguide resonator terminated by a dc superconducting quantum interference device (SQUID). An external field (the pump, similar to 20 GHz) modulates the flux threading of the dc SQUID and, therefore, the resonant frequency of the cavity field (the signal, similar to 10 GHz), which leads to the parametric signal amplification. We operated the amplifier at different band centers and observed amplification (17 dB at maximum) and deamplification depending on the relative phase between the pump and the signal. The noise temperature is estimated to be less than 0.87 K. (C) 2008 American Institute of Physics.

引用

页数：3

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