Curriculum Vitae

Fumiyoshi Kobayashi

  • Researcher, Mercari R4D, Mercari Inc.
  • JSPS Research Fellowship for Young Scientists (PD)
  • Visiting Researcher, Media Design Institute, Graduate School of Media Design, Keio University

Email: f-kobayashi{at}mercari.com (Please change “{at}” to @ when you get in touch)

Office: Mercari, Inc. R4D, Roppongi Hills Mori Tower 18F, 6-10-1 Roppongi, Minato-ku, Tokyo 106-6118, Japan

Education

Ph.D. in Quantum Physics | Osaka University | March 2025
Graduate School of Engineering Science
Division: Materials Engineering Science

  • Advisor: Prof. Takashi Yamamoto
  • Thesis: “Handling noises in neutral atom quantum computing”
M.S. in Engineering Osaka University March 2022
  • Thesis: “量子多体系のシミュレーションに向けた変分量子固有値ソルバーのベンチマーク手法の提案”
  • Division Award (専攻賞)
B.S. in Engineering Osaka University March 2020
  • Materials Physics Course, Department of Electronic and Physical Sciences

Specialized Programs

Interactive Materials Science Cadet Program (8th Cohort) Osaka University 2020-2025
  • Doctoral Leading Program for advanced interdisciplinary materials science education
  • Comprehensive training in materials science research and international collaboration

Academic Positions

Researcher Mercari R4D April 2025 - Present
JSPS Research Fellowship for Young Scientists (PD) JSPS April 2025 - Present
  • Quantum computing research and development in industry setting
  • Quantum error correction and fault-tolerant quantum computing
  • Development of quantum algorithms for neutral atom quantum computers
Researcher Media Design Institute, Graduate School of Media Design (KMD), Keio University May 2026 - Present
  • Technical advise for Quantum Future Design of Q/est
Specially Appointed Research Fellow S Osaka University, Quantum Information and Quantum Biology April 2022 - March 2025
  • Research on quantum error correction and fault-tolerant quantum computing
  • Development of quantum algorithms for neutral atom quantum computers
Visiting Research Student The University of Queensland Sep-Dec 2023, May-Jun 2024
  • Supervised by Prof. Tom Stace
  • Research on tensor-network codes
  • Research on non-Markovian noise and process tensor methods
Junior Researcher Mercari R4D June 2022 - March 2023
  • Quantum error correction for neutral atom quantum computers

Research Interests

  • Quantum Error Correction and Fault-Tolerant Quantum Computing
  • Neutral Atom Quantum Computing and Rydberg Atom Systems
  • Tensor Network Methods for Quantum Information Processing

Publications

Journal Articles: 2
Preprints: 1
Total Publications: 3
For complete publication list, see Publications page

Grants and Funding

JSPS Research Fellowship for Young Scientists (PD) Japan Society for the Promotion of Science ¥7,500,000 total 2025-2027
  • Role: Principal Investigator
  • Project No.: 25KJ0445
  • Period: April 2025 - March 2028
  • Description: The budget entitled “大規模中性原子量子コンピュータに向けた分散型量子誤り訂正理論の開拓” in japanese aims to research and develop theoretical aspects of distributed neutral atom quantum computers. The detail is in the link
Super Hierarchical Materials Science Program Fellowship Osaka University Fellowship Program ¥8,000,000+ total 2022-2025
  • Role: Fellowship Recipient
  • Description: Monthly stipend (¥180,000) and research funding (¥500,000/year) for 3 years
  • Supporting advanced doctoral research in quantum materials science

Awards & Honors

  • 2022: Division Award (専攻賞), Graduate School of Engineering Science, Osaka University
  • 2022: Completion of Mathematical Modeling Advanced Program, Osaka University
  • 2021: Osaka University Creative Educational Research Activity Award
  • 2021: Completion of Quantum Software Research Hub Training Program, JST
  • 2019: Completion of Dalian University of Technology 70th Anniversary Japan-China Student Exchange Conference

Teaching Experience

Teaching Assistant - Quantum Software Workshop Group Work JST COI-NEXT “Quantum Software Research Hub” 2021
  • Facilitating group work sessions for quantum software education program
  • Supporting to learn in quantum computing fundamentals
Teaching Assistant - Machikane Seminar “Creating Science Teaching Materials” Osaka University 2020
  • Course: “学問への扉（マチカネゼミ）「理科の副教材をつくろう－生徒実験資料の作成－」”
  • Assisting undergraduate students in developing educational materials for basic experiments

Service

Professional Service

  • 2026: Moderator (「先輩研究者の講演・グループディスカッション」 session), 日本学術振興会 特別研究員-DCフレンドシップミーティング 2026
  • 2026: A member of Program WG, Quantum Summer School 2026, Quantum Science School (QuSS)
  • 2026: Committee Member, IEICE Technical Committee on Quantum Information Technology (QIT)
  • 2020-2025: Program Committee Member, Quantum Information Kansai Student Chapter

University Service

  • 2022-2025: Representative, Quantum Information Kansai Student Chapter
  • 2020-2021: Treasurer, 66th Condensed Matter Physics Summer School Organizing Committee
  • 2022: Research Assistant, Osaka University Graduate School of Engineering Science

Conference Presentations

Invited Talks

  • 2025: “Tensor-network decoders for process tensor descriptions of non-Markovian noise” at 2025 YITP Logical Gates for Encoded Qubits Workshop, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, Japan (18 April 2025) [link]

  • 2025: “誤り耐性量子計算に向けた中性原子量子デバイスにおける量子誤り訂正手法” at 京都大学 高橋研・分子研合同セミナー, 京都大学吉田キャンパス 5号館, Kyoto, Japan (11 March 2025)

  • 2025: “量子誤り訂正nutshell” at Yaqumo, inc. internal seminar, Graduate School of Science Bldg. No.5, Kyoto University, Kyoto, Japan (21 November 2025)

Oral Presentations

  • 2025: 「Tensor-network decoders for process tensor descriptions of non-Markovian noise」 (with H. Manabe, G. A. L. White, T. Farrelly, K. Modi, T. M. Stace) at 第198回ハイパフォーマンスコンピューティング・第14回量子ソフトウェア合同研究発表会, 北海道大学 学術交流会館 小講堂/オンライン (March 17, 2025)

  • 2024: 「テンソルネットワーク符号と最近の動向について」 at 第33回量子情報関西Student Chapter, 京都大学 吉田キャンパス (July 5, 2024)

  • 2023: 「Rydberg原子量子コンピュータ上の表面符号における消失エラーの解析」 (with S. Nagayama) at 第49回量子情報技術研究会(QIT49), 沖縄科学技術大学院大学(OIST) (December 17-19, 2023)

  • 2022: 「parent Hamiltonianを用いた量子変分固有値ソルバーのベンチマーク問題の提案」 (with K. Mitarai, K. Fujii) at 第1回ムーンショット目標6 QCNQCプロジェクト研究会, Online (January 19, 2022)

Poster Presentations

  • 2026: “Performance Evaluation of Quantum Error Corrections in Dual Ytterbium Systems” (with T. Kusano, N. Fazio, Y. Nakamura) at Quantum Error Correction 2026, Hilton Santa Barbara Beachfront Resort, Santa Barbara, USA (June 9, 2026) [link]

  • 2025: “中性原子量子コンピュータにおける表面符号を用いた消失エラー耐性プロトコル” (with S. Nagayama) at Mercari GEARS 2025, TODA HALL, Tokyo, Japan (November 13, 2025) [link]

  • 2025: “Surface Code Entanglement Ejection” (with K. S. Soon, N. Benchasattabuse, S. Nagayama) at IEEE International Conference on Quantum Computing and Engineering (QCE25), Convention Center, Albuquerque, New Mexico, USA (August 31-5, 2025) [link]

  • 2025: “Tensor-network decoders for process tensor descriptions of non-Markovian noise” (with H. Manabe, G. A. L. White, T. Farrelly, K. Modi, T. M. Stace) at Quantum Computing Theory in Practice (QCTiP2025), Harnack-Haus, Berlin, Germany (April 23-25, 2025)

  • 2024: “リュードベリ原子量子コンピュータ上の表面符号における消失耐性プロトコル” (with S. Nagayama) at 第35回量子情報関東Student Chapter, 東京大学本郷キャンパス 工学部6号館セミナーAD室, Tokyo, Japan (March 29, 2024)

  • 2024: “リュードベリ原子量子コンピュータ上の表面符号における消失耐性プロトコル” (with S. Nagayama) at ムーンショット目標6 内部全体会議2024（非公開）, ベルサール秋葉原, Tokyo, Japan (March 28, 2024)

  • 2024: “Erasure-tolerance protocol for the surface codes on Rydberg atomic quantum computers” (with S. Nagayama) at Quantum Information Processing 2024 Taipei (QIP2024), Taipei International Convention Center, Taipei, Taiwan (January 13-19, 2024)

  • 2022: “Rydberg原子量子コンピュータに対する表面符号の消失誤り訂正プロトコルの提案” (with S. Nagayama) at 第47回量子情報技術研究会 (QIT47), 慶應義塾大学 矢上キャンパス, Yokohama, Japan (December 8-9, 2022)

  • 2021: “parent Hamiltonianを用いたVQEベンチマーク問題の収束性” at 量子情報春の学校2021, Online, (March 26-28, 2021)

  • 2021: “Parent Hamiltonian as a benchmark problem for variational quantum eigensolvers” (with K. Mitarai, K. Fujii) at 24th Annual Conference on Quantum Information Processing (QIP 2021), Online, (February 1-5, 2021)

  • 2020: “行列積状態を用いたVQEベンチマーク” at 第27回量子情報関西Student Chapter, Online, (December 22, 2020)

Professional Memberships

Technical Skills

Programming & Markup Languages

  • Programming: Python (primary), Rust, Julia, C++
  • Markup & Documentation: LaTeX, Markdown, google document

Quantum Computing & Scientific Computing

  • Quantum Frameworks: Qulacs, Stim, Quimb, Qiskit, TensorNetworkCodes.jl
  • Scientific Computing: NumPy, SciPy, and so on

Development & Research Tools

  • IDEs: Cursor, VS Code, Obsidian
  • Version Control: Git and GitHub
  • Operating Systems: Linux/Unix
  • Presentation: Marp, google slide, Microsoft Office

Languages

  • Japanese: (Native)
  • English: C1 (CEFR)

Last updated: June 2026