Noise Properties of a Josephson Parametric Oscillator

被引：1
|
作者：
Bhai, Gopika Lakshmi [1 ,2 ]
Mukai, Hiroto [1 ,2 ]
Yamamoto, Tsuyoshi [3 ,4 ]
Tsai, Jaw-Shen [1 ,2 ,3 ]
机构：
[1] Tokyo Univ Sci, Grad Sch Sci, 1-3 Kagurazaka,Shinjuku, Tokyo 1620825, Japan
[2] RIKEN Ctr Quantum Comp RQC, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
[3] Tokyo Univ Sci, Res Inst Sci & Technol, 1-3 Kagurazaka,Shinjuku, Tokyo 1628601, Japan
[4] NEC Corp Ltd, Secure Syst Platform Res Labs, Kawasaki, Kanagawa 2110011, Japan
来源：
PHYSICAL REVIEW APPLIED | 2023年 / 19卷 / 01期
关键词：
PHASE NOISE; QUANTUM-NOISE; STATE; AMPLIFICATION; FLUCTUATIONS; EQUILIBRIUM; SPECTRUM; LIMIT;
D O I：
10.1103/PhysRevApplied.19.014065
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We perform noise spectroscopy of a Josephson parametric oscillator (JPO) by implementing a microwave homodyne interferometric measurement scheme. We observe the fluctuations in the selfoscillating output field of the JPO for a long 10-s time interval in a single-shot measurement and characterize the phase and amplitude noise. Furthermore, we investigate the effects of the pump strength on the output noise power spectra of the JPO. We find strong fluctuations in the phase with a 1/f (2) characteristic in the phase noise power spectrum, which are suppressed by increasing the pump strength.
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页数：7
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