Curriculum Vitae

Fumiyoshi Kobayashi
Researcher, Mercari R4D
JSPS Research Fellowship for Young Scientists (PD)
Mercari Inc.

Email: f-kobayashi{at}mercari.com
Office: Mercari, Inc. R4D, Roppongi Hills Mori Tower 18F, 6-10-1 Roppongi, Minato-ku, Tokyo 106-6118, Japan Please change “{at}” to @ when you get in touch

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

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: 1
Preprints: 2
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
Description: “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”

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

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)

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

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)
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

Quantum Information Kansai Student Chapter (Representative, 2022-2025)
Japan Society for the Promotion of Science (JSPS Research Fellowship for Young Scientists, 2025-Present)

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:

Last updated: September 2025