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■ Papers

【2024】

Tomohisa Miyao, Keito Yoshinaga, Takahisa Tanaka, Hiroki Ishikuro, Munehiro Tada, Ken Uchida 

Imaginary impedance due to hopping phenomena and evaluation of dopant ionization time in cryogenic metal-oxide-semiconductor devices on highly doped substrate

Appl. Phys. Express 17, 051001(2024), DOI: 10.35848/1882-0786/ad3d2a

Hideaki Numata, Noriyuki Iguchi, Masamitsu Tanaka, Koichiro Okamoto, Sadahiko Miura, Ken Uchida, Hiroki Ishikuro, Toshitsugu Sakamoto, Munehiro Tada

Superconducting Nb interconnects for Cryo-CMOS and superconducting digital logic applications

Jpn. J. Appl. Phys. 63, 04SP73(2024), DOI: 10.35848/1347-4065/ad37c1

Yoshinori Uzawa, Akira Kawakami, Takafumi Kojima,Kazumasa Makise, Sho Masui, Akihira Miyachi, Yosuke Murayama,Yuto Kozuki, Wenlei Shan 

Development of a Waveguide Josephson Oscillator for SIS Mixer-Based Amplifiers

IEEE Transactions on Applied Superconductivity 34, 2400205 (2024), DOI: 10.1109/TASC.2024.3358780

Daisuke Iyama, Takahiko Kamiya, Shiori Fujii, Hiroto Mukai, Yu Zhou, Toshiaki Nagase, Akiyoshi Tomonaga, Rui Wang, Jiao-Jiao Xue, Shohei Watabe, Sangil Kwon, Jaw-Shen Tsai

Observation and manipulation of quantum interference in a superconducting Kerr parametric oscillator

Nat. Commun 15, 86 (2024), DOI: 10.1038/s41467-023-44496-1

【2023】

Chia-Wei Pai, Ken Uchida, Munehiro Tada, Hiroki Ishikuro

Design and analysis of a high-speed low-power comparator with regeneration enhancement and through current suppression techniques from 4 K to 300 K in 65-nm Cryo-CMOS

Microelectronics Journal 144, C (2023), DOI: 10.1016/j.mejo.2023.106066

Munehiro Tada, Koichiro Okamoto, Takahisa Tanaka, Makoto Miyamura, Hiroki Ishikuro, Ken Uchida, Toshitsugu Sakamoto

A 65nm Cryogenic CMOS Design and Performance at 4.2K for Quantum State Controller Application

IEEE Journal of the Electron Devices Society 12, 28 (2023), DOI: 10.1109/JEDS.2023.3340136

Teruaki Yoshioka, Hiroto Mukai, Akiyoshi Tomonaga, Shintaro Takada, Yuma Okazaki, Nobu-Hisa Kaneko, Shuji Nakamura, Jaw-Shen Tsai 

Active initialization experiment of a superconducting qubit using a quantum circuit refrigerator

Phys. Rev. Applied 20, 044077(2023), DOI: 10.1103/PhysRevApplied.20.044077

Yosuke Ueno, Yuna Tomida, Teruo Tanimoto, Masamitsu Tanaka, Yutaka Tabuchi, Koji Inoue, Hiroshi Nakamura

Inter-Temperature Bandwidth Reduction in Cryogenic QAOA Machines

IEEE Computer Architecture Letters 23, 9 (2023), DOI: 10.1109/LCA.2023.3322700

Satoru Odate, Naooki Saito, Kosuke Suzuki, Hajime Aoyama, Hiroyuki Tsukamoto, Koichi Kusuyama, Yasunobu Nakamura

Fabrication of superconducting quantum circuits on 12-inch wafers using an ArF immersion lithography system

Proc. SPIE 12652, UV and Higher Energy Photonics: From Materials to Applications 2023, 1265205

Shimpei Goto, Kazuki Koshino

Efficient numerical approach for the simulations of high-power dispersive readout with time-dependent unitary transformation

Phys. Rev. A 108, 033722 (2023), DOI: 10.1103/PhysRevA.108.033722

Kaoru Yamashita, Benjamin Hershberg, Kentaro Yoshioka, Hiroki Ishikuro

A 4.6K to 400K Functional PVT-Robust Ringamp-Based 250MS/s 12b Pipelined ADC with Pole-Aware Bias Calibration

2023 IEEE Custom Integrated Circuits Conference (CICC), TX, USA, 2023, pp.740-752

Julia Zotova, Rui Wang, Alexander Semenov, Yu Zhou, Ivan Khrapach, Akiyoshi Tomonaga, Oleg Astafiev, Jaw-Shen Tsai

Compact Superconducting Microwave Resonators Based on Al-AlO x -Al Capacitors

Phys. Rev. Applied 19, 044067 (2023), DOI: 10.1103/PhysRevApplied.19.044067

Sho Masui, Takafumi Kojima, Yoshinori Uzawa, Kazumasa Makise, Hideo Ogawa, Toshikazu Onishi

Proof-of-Concept Experiment on a Wideband Microwave Gyrator with Two Superconductor– Insulator–Superconductor-Based Mixers

IEEE Transactions on Applied Superconductivity 33, 1501204 (2023), DOI: 10.1109/TASC.2023.3258368

Sho Masui, Takafumi Kojima, Yoshinori Uzawa, Toshikazu Onishi

A Novel Microwave Nonreciprocal Isolator Based on Frequency Mixers

IEEE Microwave and Wireless Technology Letters 33, 1051 (2023), DOI: 10.1109/LMWT.2023.3253124

Yoshinori Uzawa, Takafumi Kojima, Kazumasa Makise, Akira Kawakami, Yuto Kozuki, Sho Masui, Wenlei Shan

Development of an SIS Mixer-Based Low-Noise Amplifier Amenable to Josephson Oscillator Pumping

IEEE Transactions on Applied Superconductivity 33,1500804 (2023), DOI: 10.1109/TASC.2023.3254496

Kosuke Mizuno, Takaaki Takenaka, Imran Mahboob, Shiro Saito

Effect of decoherence for gate operations on a superconducting bosonic qubit

New J. Phys. 25, 033007 (2023), DOI: 10.1088/1367-2630/acc02e

Masamitsu Tanaka, Yoshihiro Kitagawa, Tetsuro Satoh, Tsuyoshi Yamamoto

Design and Fabrication of Low-Power Single-Flux-Quantum Circuits Toward Quantum Bit Control

IEEE Transactions on Applied Superconductivity 33, 1700805 (2023), DOI: 10.1109/TASC.2023.3251304

Ivan Iakoupov, Kazuki Koshino

Saturable Purcell filter for circuit quantum electrodynamics

Phys. Rev. Research 5, 013148 (2023), DOI: 10.1103/5.013148

Takafumi Kojima, Sho Masui, Wenlei Shan, Yoshinori Uzawa

Characterization of a low-noise superconductor–insulator–superconductor-based microwave amplifier with local oscillator phase-adjusting architecture

Appl. Phys. Lett. 122, 072601 (2023), DOI: 10.1063/5.0134595

Gopika Lakshmi Bhai, Hiroto Mukai, Jaw-Shen Tsai

Mitigation of noise in Josephson parametric oscillator by injection locking

Appl. Phys. Lett. 122, 054002 (2023), DOI: 10.1063/5.0134702

Gopika Lakshmi Bhai, Hiroto Mukai, Tsuyoshi Yamamoto, Jaw-Shen Tsai

Noise Properties of a Josephson Parametric Oscillator

Phys. Rev. Applied.19, 014065 (2023), DOI: 10.1103/PhysRevApplied.19.014065

【2022】

Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, Shiro Saito

Identification of Different Types of High-Frequency Defects in Superconducting Qubits

PRX Quantum 3, 040332 (2022), DOI: 10.1103/PRXQuantum.3.040332

Koichiro Okamoto, Takahisa Tanaka, Makoto Miyamura, Hiroki Ishikuro, Ken Uchida, Toshitsugu Sakamoto, Munehiro Tada

Cryogenic operation of NanoBridge at 4 K for controlling qubit

Jpn. J. Appl. Phys. 61, SC1049 (2022), DOI: 10.35848/1347-4065/ac4303

Sangil Kwon, Shohei Watabe, Jaw-Shen Tsai

Autonomous Quantum Error Correction in a Four-Photon Kerr Parametric Oscillator

npj Quantum Inf. 8, 40 (2022), DOI: 10.1038/s41534-022-00553-z

Zhi-Peng Yang, Alakesh Baishya, Huan-Yu Ku, Yu-Ran Zhang, Anton Frisk Kockum, Yueh-Nan Chen, Fu-Li Li, Jaw-Shen Tsai, Franco Nori

Deterministic One-way Logic Gates on a Cloud Quantum Computer 

Phys. Rev. A 105, 042610 (2022), DOI: 10.1103/PhysRevA.105.042610

Sishi Wu, Dengke Zhan, Rui Wang, Yulong Liu, Shuai-Peng Wang, Qichun Liu, J S Tsai, Tiefu Li

Vacuum-gap-based lumped element Josephson parametric amplifier

Chinese Phys. B 31, 010306 (2022), DOI: 10.1088/1674-1056/ac280c

【2021】

Akiyoshi Tomonaga, Hiroto Mukai, Fumiki Yoshihara, Jaw-Shen Tsai

Quasiparticle Tunneling and 1/f Charge Noise in Ultrastrongly Coupled Superconducting Qubit and Resonator

Phys. Rev. B 104, 224509 (2021), DOI: 10.1103/PhysRevB.104.224509

Takafumi Miyanaga, Akiyoshi Tomonaga, Hikaru Ito, Hiroto Mukai, Jaw-Shen Tsai

Ultrastrong Tunable Coupler Between Superconducting LC Resonators

Phys. Rev. Applied 16, 064041 (2021), DOI: 10.1103/ PhysRevApplied.16.064041

Teruaki Yoshioka, Jaw-Shen Tsai

Fast unconditional initialization for superconducting qubit and resonator using quantum-circuit refrigerator

Appl. Phys. Lett. 119, 124003 (2021), DOI: 10.1063/5.0057894

Dengke Zhang, Jaw-Shen Tsai

Magnetic-Free Traveling-Wave Nonreciprocal Superconducting Microwave Components

Phys. Rev. Applied 15, 064013 (2021), DOI: 10.1103/PhysRevApplied.15.064013

■ Books and Other Publications

【2022】

ULVAC, Inc.

Industry-Academia-Government Collaboration – Toward Technological Innovation for Quantum Computers

ULVAC VALUE REPORT 2022, 2022/11/30

Shiro Saito, Hiroki Takei

About NTT's quantum information technology research

Telecommunications September 2022

Tsuyoshi Yamamoto, Takahiro Mori

Research and Development of Quantum Computers Based on Superconductor and Semiconductor Devices

IEEJ Electronic Library, 2022/5/1

Masamitsu Tanaka, Yuki Yamanashi

Current Status and Issues of Superconductor Peripheral Circuits for Quantum Computers

IEEJ Electronic Library, 2022/5/1

【2021】

Makoto Negoro(supervision)

Quantum Sensing Handbook

Quantum Sensing Handbook, 2021/3/28

L. V. Abdurakhimov, Imran Mahboob, HirakuToida, Kosuke Kakuyanagi, Shiro Saito

A Long-lived Tunable Qubit for Bosonic Quantum Computing

NTT Technical Journal, 2021/3/1

Shiro Saitoh, Hideki Goto

Approaches to New Principle Computers

NTT Technical Journal, 2021/3/1

■ Oral Presentations

【2024】

Noriyuki Iguchi, Hideaki Numata, Masamitsu Tanaka, Koichiro Okamoto, Takahisa Tanaka, Ken Uchida, Hiroki Ishikuro, Toshitsugu Sakamoto, Munehiro Tada

200nm-pitched, Superconducting Nb Interconnects for Cryo-CMOS Application

2024 International Interconnect Technology Conference (IITC2024), San Jose, California, Session 8_4

【2023】

Masamitsu Tanaka, Yoshihiro Kitagawa, Tetsuro Satoh, Tsuyoshi Yamamoto

High-Frequency Operation of Low-Power Single-Flux-Quantum Circuits Fabricated Using 250 A/cm2 Nb/AlOx/Nb Planarization Process

2023 International Conference on IC Design and Technology (ICICDT), Tokyo, Japan, 2023, pp. 84-87

【2022】

Toshitsugu Sakamoto, Makoto Miyamura, Kazunari Funahashi, Koichiro Okamoto, Munehiro Tada, Takahisa Tanaka, Ken Uchida, Hiroki Ishikuro

Development of 65nm-Cryo-CMOS Circuit Design Library

Design Gaia 2022-hybrid, 2022/11/28-30

Takahisa Tanaka, Ken Uchida, Koichiro Okamoto, Munehiro Tada

Stochastic Modeling of Cryogenic and Room Temperature Operation of ReRAM

35th International Microprocesses and Nanotechnology Conference, JR Hotel Clement Tokushima, 2022/11/8-11

Masamitsu Tanaka, Yoshihiro Kitagawa, Tetsuro Sato, Tsuyoshi Yamamoto

Design and Fabrication of Extremely Low-Power Single-Flux-Quantum Circuits toward Quantum Bit Control

Applied Superconductivity Conference 2022, Hawaii Convention Center, Honolulu, 2022/10/23-28

Yuei Tomida, Yosuke Ueno, Teruo Tanimoto, Masamitsu Tanaka, Koji Inoue, Hiroshi Nakamura

通信量に着目した QAOA 向け極低温 NISQ コンピューティングのアーキテクチャ検討

242nd IPSJ System Architecture Research and Presentation-hybrid, 2022/10/11-12

Yasunari Suzuki, Takanori Sugiyama, Tomochika Arai, Wang Liao, Koji Inoue, Teruo Tanimoto

Q3DE: A Fault-Tolerant Quantum Computer Architecture for Multi-Bit Burst Errors by Cosmic Rays

55th IEEE/ACM International Symposium on Microarchitecture, the Westin Chicago River North, 2022/10/4

Tomohisa Miyao, Itsuki Imanishi, Takahisa Tanaka, Ken Uchida, Masayuki Ichikawa, Shuya Nakagawa, Hiroki Ishikuro, Toshitsugu Sakamoto, Munehiro Tada

Transient characteristics of 65-nm generation bulk transistors at 4.2 K operation

The 83rd JSAP Autumn Meeting 2022-hybrid, 2022/9/20-23

Hirotaka Terai, Kunihiro Inomata, Atsushi Kobayashi, Hiroki Yoshinaka, Tsuyoshi Kodama, Yuuji Hishida, Sunmi Kim, Taro Yamashita, Tomoko Fuse, Fumiki Yoshihara, Kouichi Semba

Uniformity of TiN films grown on Si (100) substrates

The 83rd JSAP Autumn Meeting 2022-hybrid, 2022/9/20-23

Sho Masui, Takafumi Kojima, Kazumasa Makise, Hideo Ogawa, Toshikazu Onishi, Yoshinori Uzawa

Proof-of-concept experiment of microwave isolator based on frequency converters

The 83rd JSAP Autumn Meeting 2022-hybrid, 2022/9/20-23

Shotaro Shirai, Atsushi Noguchi

Fabrication of high quality superconducting lumped element resonators and Transmon qubits

JPS 2022 Autumn Meeting-hybrid, 2022/9/12-15

Shimpei Goto, Kazuki Koshino

Numerical simulations of high-power dissipative readout enhanced by unitary transformations

JPS 2022 Autumn Meeting-hybrid, 2022/9/12-15

Takaaki Takenaka, Imran Mahboob, Kosuke Mizuno, Shiro Saito

Design and evaluation of the bosonic code architecture with superconducting cavity

JPS 2022 Autumn Meeting-hybrid, 2022/9/12-15

Hirotaka Terai, Sunmi Kim, Kunihiro Inomata, Taro Yamashita, Tomoko Fuse, Fumiki Yoshihara, Sahel Ashhab, Kouichi Semba

Research and development of nitride superconducting qubits

2022 IEICE Society Conference-online, 2022/9/6-9

Hiroki Ishikuro

Device characterization/ Device modelling cryogenic PDK

NEXT GENERATION QUANTUM COMPUTING-hybrid, 2022/8/29-30

Masayuki Ichikawa

Monitoring technique of self-heating in bulk MOSFETs at cryogenic temperatures

NEXT GENERATION QUANTUM COMPUTING-hybrid, 2022/8/29-30

Takafumi Kojima

2030年代のミリ波サブミリ波電波天文学に向けたSIS受信機の技術開発

The 65th JSAP Superconductors Division, Research Meeting-online, 2022/7/21

Masayuki Ichikawa, Takahisa Tanaka, Ken Uchida, Tomohisa Miyao, Munehiro Tada, Hiroki Ishikuro

In Situ Monitoring Technique of Self-Heating in Bulk MOSFETs at Cryogenic Temperatures using Subthreshold Current

IEEE Latin American Electron Devices Conference 2022-hybrid, 2022/7/4-6

Koichiro Okamoto, Takahisa Tanaka, Makoto Miyamura, Hiroki Ishikuro, Ken Uchida, Toshitsugu Sakamoto, Munehiro Tada

Cryogenic CMOS Performance Analysis Including BEOL Characteristics at 4K for Quantum Controller Application

IITC 2022-hybrid, 2022/6/27-30

Tomohisa Miyao, Takahisa Tanaka, Itsuki Imanishi, Masayuki Ichikawa, Shuya Nakagawa, Hiroki Ishikuro, Toshitsugu Sakamoto, Munehiro Tada, Ken Uchida

Enhanced Drain Current in Transient Mode due to Long Ionization Time of Shallow Impurities at 4 K in 65-nm bulk Cryo CMOS Transistors

80th Device Research Conference-hybrid, 2022/6/26-29

Masamitsu Tanaka, Yoshihiro Kitagawa, Tetsuro Satoh, Tsuyoshi Yamamoto

Design of Single Flux Quantum Circuits with Critical Current Density Process Lowered to 250 A/cm2 toward Quantum Bit Control

The 69th JSAP Spring Meeting 2022-hybrid, 2022/3/22-26

Tomohisa Miyao, Takahisa Tanaka, Ken Uchida

Development of MOS Capacitance Evaluation Method at Cryogenic Temperature (4K)

The 69th JSAP Spring Meeting 2022-hybrid, 2022/3/22-26

Shotaro Shirai, Kohei Matsuura, Yasunobu Nakamura, Atsushi Noguchi

Quantum state control of a superconducting resonator using second-order nonlinear effects

JPS 77th Annual Meeting, The Physical Society of Japan-online, 2022/3/17

Yuki Matsuyama, Shotaro Shirai, Atsushi Noguchi

Design and Evaluation of Three Layer PCB for Superconducting Circuits

JPS 77th Annual Meeting, The Physical Society of Japan-online, 2022/3/17

Akiyoshi Tomonaga, Takafumi Miyanaga, Hikaru Ito, Hiroto Mukai, Jaw-Shen Tsai

Ultrastrong tunable coupler between superconducting LC resonators

JPS 77th Annual Meeting, The Physical Society of Japan-online, 2022/3/17

Kosuke Mizuno, Takaaki Takenaka, Imran Mahboob, Shiro Saito

Numerical investigation of gate fidelity by optimal control for Bosonic qubit in superconducting cavity

JPS 77th Annual Meeting, The Physical Society of Japan-online, 2022/3/17

Akiyoshi Tomonaga, Takafumi Miyanaga, Hikaru Ito, Hiroto Mukai, Jaw-Shen Tsai

Ultrastrong tunable coupler between superconducting LC resonators

APS March Meeting 2022-online, 2022/3/14-18

L. V. Abdurakhimov, I. Mahboob1, H. Toida, K. Kakuyanagi, Y. Matsuzaki, S. Saito

Detection of TLS defects coupled to a c-shunt flux qubit via critical-current fluctuations

APS March Meeting 2022-online, 2022/3/14-18

Ivan Iakoupov, Kazuki Koshino

Saturable Purcell filter for circuit QED

APS March Meeting 2022-online, 2022/3/14-18

Makoto Negoro, Kazuhisa Ogawa, Takefumi MIYOSHI, Hidehisa Shiomi, Shinichi Morisaka, Mitsuki Kobachi, Kazuma Moriuch, Ryohei Niwase, Yuta Kawai, Keisuke Koike, Satoshi Funada, Shuhei Tamate, Yutaka Tabuchi, Yasunobu Nakamura

Superconducting qubit control with a system of an integrated microwave board and FPGA

APS March Meeting 2022-online, 2022/3/14-18

Sho Masui, Takafumi Kojima, Kazumasa Makise, Yoshinori Uzawa, Hideo Ogawa, Toshikazu Onishi

集中定数素子を用いた4-12GHz帯90度ハイブリッドカプラの設計

The Astronomical Society of Japan Annual Spring Meeting 2022-online, 2022/3/3

【2021】

Yoshinori Uzawa, Takafumi Kojima, Kazumasa Makise, Akira Kawakami, Yuto Kozuki, Sho Masui, Wenlei Shan

Development status of an SIS-mixer-based amplifier

The 22nd East Asia Submillimeter-wave Receiver Workshop-online, 2021/11/25-26

Sho Masui, Takafumi Kojima, Yoshinori Uzawa, Hideo Ogawa, Toshikazu Onishi

Proof-of-concept experiment on a novel microwave circulator

The 22nd East Asia Submillimeter-wave Receiver Workshop-online, 2021/11/25-26

Takafumi Kojima, Yoshinori Uzawa, Yuto Kozuki, Yasunori Fujii, Kazumasa Makise, Wenlei Shan

Microwave performance of an SIS-based amplifier with a millimeter-wave isolator

The 82nd JSAP Autumn Meeting 2021-online, 2021/9/10-13

Sho Masui, Takafumi Kojima, Yoshinori Uzawa, Hideo Ogawa, Toshikazu Onishi

アップ/ダウンコンバート Mixer を用いた Isolator のための原理確認実験

Astronomical Society of Japan Annual Fall Meeting 2021-online, 2021/9/13-15

Kouichiro Okamoto,Takahisa Tanaka, Makoto Miyamura, Toshitsugu Sakamoto, Hiroki Ishikuro, Ken Uchida, Munehiro Tada

Cryogenic Operation of NanoBridge at 4K for Controlling Qubit

2021 International Conference on Solid State Devices and Materials-online, 2021/9/6-9

Takafumi Kojima

電波天文用受信機フロントエンドとマイクロ波帯超伝導増幅デバイスの研究開発

Cadence LIVE Japan 2021-online, 2021/7/16

L. V. Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, ShiroSaito

Spectroscopy of high-frequency TLS defects in superconducting qubits using a spin-locking pulse sequence

APS March Meeting 2021-online, 2021/3/15-19

Takafumi Miyanaga, Hikaru Ito, Akiyoshi Tomonaga, Hiroto Mukai, Jaw-Shen Tsai

Implementation of high intensity variable coupling elements between superconducting quasi-lumped element resonators

JPS 76th Annual Meeting, The Physical Society of Japan-online, 2021/3/12-15

Yoshihiro Minegishi, Kosuke Mitarai, Akinori Kagawa, Masahiro Kitagawa, Makoto Negoro

Speeding up numerical optimization of NMR control and evaluating the robustness of the optimized pulse

JPS 76th Annual Meeting, The Physical Society of Japan-online, 2021/3/12-15

■ Poster Presentations

【2022】

Sho Masui, Takafumi Kojima, Kazumasa Makise, Hideo Ogawa, Toshikazu Onishi, Yoshinori Uzawa

Concept of a novel microwave isolator for a large integrated circuit

The Applied Superconductivity Conference 2022, Hawaii Convention Center, 2022/10/23-28

Takafumi Kojima, Yoshinori Uzawa, Sho Masui, Yuto Kozuki, Yasunori Fujii, Kazumasa Makise, Wenlei Shan

Microwave performance of an SIS-based amplifier with a millimeter-wave isolator

The Applied Superconductivity Conference 2022, Hawaii Convention Center, 2022/10/23-28

Sho Masui, Hideo Ogawa , Toshikazu Onishi , Kazumasa Makise , Takafumi Kojima and Yoshinori Uzawa

Proof-of-concept experiment on a novel microwave circulator based on frequency converters

32nd International Symposium on Space Terahertz Technology (ISSTT 2022), Baeza City Hall, Andalusia, 2022/10/16-20

Takafumi Kojima, Yoshinori Uzawa, Sho Masui, Yuto Kozuki, Yasunori Fujii, Kazumasa Makise, Wenlei Shan

Noise temperature and S-parameter measurements of an SIS-based microwave amplifier

32nd International Symposium on Space Terahertz Technology (ISSTT 2022), Baeza City Hall, Andalusia, 2022/10/16-20

【2021】

Takaaki Takenaka, Imran Mahboob, Kosuke Mizuno, Takayuki Kubo, Takayuki Saeki, Shiro Saito

High-Q Superconducting 3D Cavities for Bosonic Codes

International Symposium on Novel maTerials and quantum Technologies (ISNTT2021)-online, 2021/12/14-17

Kosuke Mizuno, Imran Mahboob, Takaaki Takenaka, Shiro Saito

Numerical Investigation of Gate Fidelity Using Optimal Control Theory on Bosonic Codes in a Circuit-QED System

International Symposium on Novel maTerials and quantum Technologies (ISNTT2021)-online, 2021/12/14-17

■ Invited talks

【2022】

Leonid Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, Shiro Saito

A novel technique for the spectroscopy of parasitic defects in superconducting qubits

International Symposium on Superconductivity (ISS2022)-hybrid, 2022/11/29-12/1

Munehiro Tada

不揮発・低消費電力ナノブリッジFPGA 技術とIoT 端末への応用

The Planarization and CMP Technical Committee, The Japan Society for Precision Engineering (The 202nd Research Meeting)-hybrid, 2022/10/21

Jaw-Shen Tsai

Recent progress in superconducting quantum information

Virtual QBIC Workshop 2022-online, 2022/10/12-14

Aiko Yamaguchi

Recent Progress in Quantum annealing machine using Kerr-Parametric Oscillators

2022 International Conference on Solid State Devices and Materials-online, 2022/9/26-29

Munehiro Tada

Challenge and Opportunity of Low-power Nonvolatile FPGA using NanoBridge for Cryogenic Quantum Controller

2022 International Conference on Solid State Devices and Materials-online, 2022/9/26-29

Masamitsu Tanaka

量子コンピュータに向けた超伝導ディジタル周辺回路

2022 IECE Society Conference-online, 2022/9/6-9

Ken Uchida, Takahisa Tanaka, Tomohisa Miyao

Device characterization for cryogenic CMOS, investigating self heating phenomena

NEXT GENERATION QUANTUM COMPUTING-hybrid, 2022/8/29-30

Atsushi Noguchi

Hybrid quantum systems with trapped electrons via superconducting circuits

NEXT GENERATION QUANTUM COMPUTING-hybrid, 2022/8/29-30

L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, Y. Matsuzaki, S. Saito

Detection of high-frequency defects in superconducting qubits

SQA Conference 2022-hybrid, 2022/8/25-28

Yoshinori Uzawa

大規模ヘテロダインアレイ用超伝導マイクロ波増幅器の開発

The 5th LST Seminar-online, 2022/5/26

Jaw-Shen Tsai

Superconducting quantum computer and its future issue

QLEAR Fellowship Researcher Exchange-hybrid, 2022/3/8

Yoshinori Uzawa, Takafumi Kojima, Wenlei Shan, Kazumasa Makise, Gonzalez Alvaro, Norihiko Sekine

Research and development toward ALMA upgrades

International Symposium on Future Trends of Terahertz Semiconductor Technologies 2022(TST2022)-online, 2022/3/6

Jaw-Shen Tsai

Planar integration of superconducting qubits

ISQNS 2022 International Symposium on Quantum Nano Science-online, 2022/1/13

【2021】

Jaw-Shen Tsai

Superconducting quantum computer and its future issues

14th Pacific Rim Conference on Ceramic and Glass Technology (PACRIM 14)-online, 2021/12/13-16

Tsuyoshi Yamamoto

Progress in superconducting quantum computer

The 45th Quantum Information Technology Symposium (QIT45)-online, 2021/11/30-12/1

Jaw-Shen Tsai

Superconducting quantum information, recent progress in our lab

The Virtual QBIC Workshop 2021-online, 2021/10/13-15

Takafumi Kojima

ミリ波サブミリ波電波望遠鏡を支える受信機技術の動向と将来開発

ASJ Annual Fall Meeting 2021-online, 2021/9/13-15

Jaw-Shen Tsai

平面実装可能な超伝導量子コンピュータ

The 68th JSAP SPRING MEETING 2021-online, 2021/3/16-19