Observation of quantized energy levels in a Josephson junction using SFQ circuits

被引：3
|
作者：
Yamanashi, Y [1 ]
Ito, M [1 ]
Tagami, A [1 ]
Yoshikawa, N [1 ]
机构：
[1] Yokohama Natl Univ, Dept Elect & Comp Engn, Yokohama, Kanagawa 2408501, Japan
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2005年 / 15卷 / 02期
关键词：
energy level quantization; Josephson junction; qubit; SFQ circuit;
D O I：
10.1109/TASC.2005.850088
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A single flux quantum (SFQ) circuit to measure quantized energy levels in a Josephson junction has been proposed and implemented, which allows us to perform high-speed and low-noise measurements of the escape rate in Josephson junctions. By using this technique, the measurement of escape rate has been carried out at 4.2 K, the temperature three times higher than the crossover temperature. The test results show periodic dependence of the escape rate on the junction bias current, which is caused by the energy quantization effect in the Josephson junction.
引用
下载
收藏
页码：864 / 867
页数：4
相关论文
共 50 条
  • [1] High-speed measurement method of quantized energy levels in Josephson junctions using SFQ circuits
    Yamanashi, Y
    Ito, M
    Tagami, A
    Yoshikawa, N
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 412 : 1546 - 1549
  • [2] SFQ control circuits for Josephson junction qubits
    Semenov, VK
    Averin, DV
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2003, 13 (02) : 960 - 965
  • [3] Josephson Junction Stuck-At Fault Detection in SFQ Circuits
    Qoutb, Abdelrahman G.
    Whiteley, Stephen
    Kawa, Jamil
    Friedman, Eby G.
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2023, 33 (06)
  • [4] Observation of quantized voltage steps using a Josephson junction array driven by optoelectronically generated pulses
    Urano, Chiharu
    Kaneko, Nobuhisa
    Maezawa, Masaki
    Itatani, Taro
    Gorwadkar, Sucheta
    Saitou, Hiroshi
    Maeda, Joji
    Kiryu, Shogo
    IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2007, 56 (02) : 614 - 618
  • [5] Braiding Operations for a Topological Josephson Junction Array Using a Bipolar Current Pulse Generator Controlled by SFQ Logic Circuits
    Myoren, Hiroaki
    Funazawa, Takuro
    Oba, Kitaru
    Shimizu, Yuki
    Naruse, Masato
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2024, 34 (03) : 1 - 6
  • [6] Modeling of a long Josephson junction coupled to SFQ elements
    Zhang, YM
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1999, 9 (02) : 4053 - 4056
  • [7] Characterization of HTS SFQ circuits using interface-engineered Josephson junctions
    Saitoh, K
    Soutome, Y
    Fukazawa, T
    Tarutani, Y
    Takagi, K
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2001, 11 (01) : 791 - 794
  • [8] Hardware Random Number Generator Using Josephson Oscillation and SFQ Logic Circuits
    Onomi, Takeshi
    Mizugaki, Yoshinao
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2020, 30 (07)
  • [9] OBSERVATION OF COMBINED JOSEPHSON AND CHARGING EFFECTS IN SMALL TUNNEL JUNCTION CIRCUITS
    FULTON, TA
    GAMMEL, PL
    BISHOP, DJ
    DUNKLEBERGER, LN
    DOLAN, GJ
    PHYSICAL REVIEW LETTERS, 1989, 63 (12) : 1307 - 1310
  • [10] Complementary Josephson Junction circuits
    Terzioglu, E
    Gupta, D
    Beasley, MR
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1997, 7 (02) : 3642 - 3645
12345