Shiro Tamiya

Preprints

1. [2]
   Proof of a positive coherent-error threshold for topological quantum codes

   Shiro Tamiya, Masato Koashi

   arXiv:2609.20708 (2026)

   QECCoherent errorsThreshold theoremTopological codes
2. [1]
   Degeneracy Cutting: A Local and Efficient Post-Processing for Belief Propagation Decoding of Quantum Low-Density Parity-Check Codes

   Kento Tsubouchi, Hayata Yamasaki, Shiro Tamiya

   arXiv:2510.08695 (2025)

   QLDPC codesDecoder

Journal Articles

1. [8]
   Fault-tolerant quantum computation with polylogarithmic time and constant space overheads

   Shiro Tamiya, Masato Koashi, Hayata Yamasaki

   Nature Physics 22, 27–32 (2026)·arXiv:2411.03683

   FTQCThreshold theoremQLDPC codesConcatenated codes
2. [7]
   Concatenate codes, save qubits

   Satoshi Yoshida, Shiro Tamiya, Hayata Yamasaki

   npj Quantum Information 11, 88 (2025)·arXiv:2402.09606

   FTQCConcatenated codes
3. [6]
   Scalable Networking of Neutral-Atom Qubits: Nanofiber-Based Approach for Multiprocessor Fault-Tolerant Quantum Computer

   Shinichi Sunami, Shiro Tamiya, Ryotaro Inoue, Hayata Yamasaki, Akihisa Goban

   PRX Quantum 6, 010101 (2025)·arXiv:2407.11111

   FTQCNeutral Atoms
4. [5]
   Low-depth random Clifford circuits for quantum coding against Pauli noise using a tensor-network decoder

   Andrew S. Darmawan, Yoshifumi Nakata, Shiro Tamiya, Hayata Yamasaki

   Physical Review Research 6, 023055 (2024)·arXiv:2212.05071

   QECRandomnessTensor Network
5. [4]
   Stochastic gradient line Bayesian optimization for efficient noise-robust optimization of parameterized quantum circuits

   Shiro Tamiya, Hayata Yamasaki

   npj Quantum Information 8, 90 (2022)·arXiv:2111.07952

   VQAOptimization
6. [3]
   Calculating nonadiabatic couplings and Berry's phase by variational quantum eigensolvers

   Shiro Tamiya, Sho Koh, Yuya O. Nakagawa

   Physical Review Research 3, 023244 (2021)·arXiv:2003.01706

   VQEQuantum Chemistry
7. [2]
   Qulacs: a fast and versatile quantum circuit simulator for research purpose

   Yasunari Suzuki, Yoshiaki Kawase, Yuya Masumura, Yuria Hiraga, Masahiro Nakadai, Jiabao Chen, Ken M Nakanishi, Kosuke Mitarai, Ryosuke Imai, Shiro Tamiya, Takahiro Yamamoto, Tennin Yan, Toru Kawakubo, Yuya O Nakagawa, Yohei Ibe, Youyuan Zhang, Hirotsugu Yamashita, Hikaru Yoshimura, Akihiro Hayashi, Keisuke Fujii

   Quantum 5, 559 (2021)·arXiv:2011.13524·GitHub

   SimulatorSoftware
8. [1]
   Quantum circuits for exact unitary t-designs and applications to higher-order randomized benchmarking

   Yoshifumi Nakata, Da Zhao, Takayuki Okuda, Eiichi Bannai, Yasunari Suzuki, Shiro Tamiya, Kentaro Heya, Zhiguang Yan, Kun Zuo, Shuhei Tamate, Yutaka Tabuchi, Yasunobu Nakamura

   PRX Quantum 2, 030339 (2021)·arXiv:2102.12617

   RandomnessBenchmarking

Invited Talks

1. [3]
   Fault-tolerant quantum computation with polylogarithmic time and constant space overheads

   Quantum Error Correction Theory Workshop for Young Researchers, Nagoya University, Japan, December 17–19, 2025
2. [2]
   量子 LDPC 符号と量子計算への応用

   エクスパンダーグラフの新しい構成手法の確立とその応用 3, 九州大学, 2024/09/09–11
3. [1]
   Stochastic Gradient Line Bayesian Optimization: Efficient Noise-Robust Optimization for Parameterized Quantum Circuits

   Shiro Tamiya, Hayata Yamasaki

   Quantum Information Processing and Quantum Machine Learning (QIP-QML 2022), IQOQI Vienna, Austrian Academy of Sciences, February 21 – March 11, 2022

Contributed Talks

1. [9]
   Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes

   Shiro Tamiya, Masato Koashi, Hayata Yamasaki

   20th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2025), Bengaluru, India, September 15–19, 2025
2. [8]
   Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes

   Shiro Tamiya, Masato Koashi, Hayata Yamasaki

   7th International Conference on Quantum Error Correction (QEC25), Connecticut, United States, August 11–15, 2025
3. [7]
   Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes

   Shiro Tamiya, Masato Koashi, Hayata Yamasaki

   24th Asian Quantum Information Science Conference (AQIS 2024), Hokkaido University, Japan, August 26–30, 2024
4. [6]
   Quantum coding with random Clifford circuits

   Shiro Tamiya, Andrew S. Darmawan, Yoshifumi Nakata, Hayata Yamasaki

   QEC Workshop 2023, Yukawa Institute for Theoretical Physics (YITP), Kyoto University, Japan, March 20–31, 2023
5. [5]
   Stochastic Gradient Line Bayesian Optimization: Reducing Measurement Shots in Optimizing Parameterized Quantum Circuits

   Hayata Yamasaki, Shiro Tamiya

   4th International Workshop on Quantum Resource Estimation (QRE 2022), New York, USA, June 18, 2022
6. [4]
   Stochastic Gradient Line Bayesian Optimization: Reducing Measurement Shots in Variational Quantum Algorithms

   Shiro Tamiya, Hayata Yamasaki

   APS March Meeting 2022, Chicago, USA, March 14–18, 2022
7. [3]
   Stochastic Gradient Line Bayesian Optimization: Reducing Measurement Shots in Variational Quantum Algorithms

   Shiro Tamiya, Hayata Yamasaki

   21st Asian Quantum Information Science Conference (AQIS 2021), The University of Tokyo, Japan (Online), September 1–4, 2021
8. [2]
   Explicit constructions of exact unitary t-designs and applications to higher-order randomized benchmarking

   Yoshifumi Nakata, Da Zhao, Takayuki Okuda, Eiichi Bannai, Yasunari Suzuki, Shiro Tamiya, Kentaro Heya, Zhiguang Yan, Kun Zuo, Shuhei Tamate, Yutaka Tabuchi, Yasunobu Nakamura

   21st Asian Quantum Information Science Conference (AQIS 2021), The University of Tokyo, Japan (Online), September 1–4, 2021
9. [1]
   Explicit constructions of exact unitary t-designs and applications to higher-order randomized benchmarking

   Yoshifumi Nakata, Da Zhao, Takayuki Okuda, Eiichi Bannai, Yasunari Suzuki, Shiro Tamiya, Kentaro Heya, Zhiguang Yan, Kun Zuo, Shuhei Tamate, Yutaka Tabuchi, Yasunobu Nakamura

   16th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2021), University of Latvia, Riga, Latvia (Online), July 5–8, 2021

Posters

1. [3]
   Degeneracy Cutting: A Local and Efficient Post-Processing for Belief Propagation Decoding of Quantum Low-Density Parity-Check Codes

   Shiro Tamiya, Hayata Yamasaki, Kento Tsubouchi

   29th Annual Quantum Information Processing Conference 2026 (QIP2026), University of Latvia, Latvia, January 24–30, 2026
2. [2]
   Calculating nonadiabatic couplings by variational quantum eigensolvers

   Shiro Tamiya, Sho Koh, Yuya O. Nakagawa

   Pacifichem 2021, Online, December 16–21, 2021
3. [1]
   Variational quantum algorithms for calculating nonadiabatic couplings

   Shiro Tamiya, Sho Koh, Yuya O. Nakagawa

   15th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2020), Online, June 9–12, 2020

Seminars & Lectures

1. [6]
   Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes

   ICEPP seminar, The University of Tokyo, October 9, 2025
2. [5]
   Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes

   QunaSys internal seminar, オンライン, 2024年12月13日
3. [4]
   Concatenate codes, save qubits

   NTT seminar, NTT Musashino Research and Development Center, November 1, 2024
4. [3]
   Concatenate codes, save qubits

   第64回 Q-LEAP 量子 AI セミナー, オンライン, 2024年7月16日
5. [2]
   低オーバーヘッド誤り耐性量子計算

   QIH・MS6・Q-LEAP サマースクール 2024, サンライズ九十九里講師
6. [1]
   Low-overhead fault-tolerant quantum computation

   第35回量子情報関東 Student Chapter 研究会, 東京大学 本郷キャンパス, 2024年3月29日

Domestic Conferences

1. [9]
   定数空間・対数多項式時間オーバーヘッド誤り耐性量子計算

   田宮 志郎, 小芦 雅斗, 山崎 隼汰

   日本物理学会 第81回年次大会 (2026年), 16aA108-1, 領域1 量子情報（理論）, 東京大学 駒場キャンパス, 2026年9月16日
2. [8]
   測定誘起相転移の体積則相におけるランダム量子回路の誤り訂正能力

   田宮 志郎, 中田 芳史

   日本物理学会 第78回年次大会, 16aB204, 東北大学, 2023年9月
3. [7]
   ゼロ磁場ダイヤモンド NV 中心における弱結合核スピン検出・操作手法の研究

   江川 直也, 田宮 志郎, 渡辺 幹成, 小坂 英男

   第18回ナノテク交流シンポジウム, 横浜国立大学, 2023年3月7日
4. [6]
   Decoupling approach に基づく低深度量子ランダム符号の性能評価

   田宮 志郎, Andrew S. Darmawan, 山崎 隼汰, 中田 芳史

   日本物理学会 第77回年次大会, 15pE11, オンライン, 2022年3月
5. [5]
   確率的勾配方向ベイズ最適化による変分量子アルゴリズムに必要な測定回数の削減

   田宮 志郎, 山崎 隼汰

   日本物理学会 第76回年次大会, 15aA1-7, オンライン, 2021年3月
6. [4]
   確率的勾配方向ベイズ最適化に基づく変分量子アルゴリズムの測定回数の削減

   田宮 志郎, 山崎 隼汰

   量子情報春の学校2021, オンライン開催, 2021年3月26日〜28日ポスター
7. [3]
   NISQ 上での非断熱結合計算

   田宮 志郎, 中川 裕也

   日本物理学会 第75回年次大会, 17pK33-4, オンライン, 2020年3月
8. [2]
   ダイヤモンド NV 中心による量子情報デバイスの実現に向けたハミルトニアンラーニング

   田宮 志郎, 倉見谷 航洋, 古賀 悠太, 石坂 泰一, 松田 一泰, 小坂 英男

   第66回応用物理学会春季学術講演会, 9p-M111-6, 東京工業大学 大岡山キャンパス, 2019年3月9日
9. [1]
   機械学習によるダイヤモンド NV 中心ハミルトニアン推定

   田宮 志郎, 倉見谷 航洋, 古賀 悠太, 石坂 泰一, 松田 一泰, 小坂 英男

   第14回ナノテク交流シンポジウム, N24, 横浜市立大学 金沢八景キャンパス, 2019年3月8日

Awards & Fellowship

• 2026
  若手ポスター賞 / Young Researcher Poster Award

  JST ムーンショット目標6 夏合宿 2026 / JST Moonshot Goal 6 Summer Camp 2026
• 2025
  Best Paper Award

  20th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2025), Bengaluru, India

  “Polylog-time- and constant-space-overhead fault-tolerant quantum computation with quantum low-density parity-check codes” — Shiro Tamiya, Masato Koashi, Hayata Yamasaki
• 2023
  JSPS Research Fellowship for Young Scientists (DC2)

  日本学術振興会 特別研究員 (DC2), 2023年4月 – 2024年3月
• 2019
  最優秀発表賞 / Best Presentation Award

  第14回ナノテク交流シンポジウム, 横浜市立大学, 2019年3月

  「機械学習によるダイヤモンド NV 中心ハミルトニアン推定」