Haruna, Junichi(Graduate School of Informatics, Department of Informatics) | Activity Database on Education and Research, Kyoto University

Haruna, Junichi

Graduate School of Informatics, Department of Informatics Program-Specific Researcher

Last Updated :2026/09/11

Basic Information

Email Address

Email Address
haruna.junichi.5zkyoto-u.ac.jp

Professional Memberships

From Jun. 2019, To Present
Japan Physical Society

Academic Degree

23 Mar. 2020
京都大学修士（理学）

23 Mar. 2023
京都大学博士（理学）

Academic Resume (Undergraduate School/Majors)

京都大学, 理学部理学科, 卒業

Research History

From Jul. 2018, To Oct. 2019
National Institute of Informatics, Research and Experiment Assistant

From Apr. 2026, To Present
Kyoto University, Graduate School of Informatics Department of Communications and Computer Engineering, Specially Appointed Researcher

From Apr. 2023, To Mar. 2026
The University of Osaka, Center for Quantum Information and Quantum Biology, Specially Appointed Researcher

ID,URL

ORCID ID
0000-0002-1828-8183
J-Global ID
202501011635923495
Researcher number
81029015

researchmap URL

https://researchmap.jp/jharuna

Last Updated :2026/09/11

Research

Research Interests

Particle Physics

Quantum Computing

Homology Algebra

Gauge Theory

Quantum Erorr Correction

Functional Renormalization Group

Research Areas

Natural sciences, Mathematical physics and basic theory

Natural sciences, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

Papers

Gradient Flow Exact Renormalization Group for Scalar Field Theories
Junichi Haruna
Kyoto University, Mar. 2023

Non-perturbative analysis of quantum field theory by the large N limit and physics of the Planck scale
Junichi Haruna
Kyoto University, Mar. 2020

Homological Origin of the Transversal Implementability of Logical Diagonal Gates in Quantum CSS Codes
Haruna, Junichi
PTEP, 09 Jul. 2026, Peer-reviewed, Lead author, Corresponding author

Note on Logical Gates by Gauge Field Formalism of Quantum Error Correction
Haruna, Junichi
PTEP, 03 Jun. 2026, Peer-reviewed, Lead author, Corresponding author

Hierarchical Quantum Error Correction with Hypergraph Product Code and Rotated Surface Code
Haruna, Junichi; Fujii, Keisuke
PTEP, 23 Sep. 2025, Peer-reviewed, Lead author, Corresponding author

Functional renormalization group analysis of the O(3) nonlinear sigma model and non-Abelian bosonization duality
Haruna, Junichi; Shimizu, Keito; Yamada, Masatoshi
Phys.Rev.D, 15 Feb. 2025, Peer-reviewed, Lead author, Corresponding author

End-to-end complexity for simulating the Schwinger model on quantum computers
Sakamoto, Kazuki; Morisaki, Hayata; Haruna, Junichi; Itou, Etsuko; Fujii, Keisuke; Mitarai, Kosuke
Quantum, 17 Sep. 2024, Peer-reviewed
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Gradient Flow Exact Renormalization Group for Scalar Quantum Electrodynamics
Haruna, Junichi; Yamada, Masatoshi
JHEP, 24 May 2024, Peer-reviewed, Lead author, Corresponding author

Nonperturbative aspects of two-dimensional TT¯ -deformed scalar theory from functional renormalization group
Jie Liu; Junichi Haruna; Masatoshi Yamada
Physical Review D, 13 Mar. 2024, Peer-reviewed

Path integral approach to universal dynamics of reservoir computers
Junichi Haruna; Riki Toshio; Naoto Nakano
Physical Review E, 14 Mar. 2023, Peer-reviewed, Lead author, Corresponding author
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Fixed point structure of the gradient flow exact renormalization group for scalar field theories
Abe, Yoshihiko; Hamada, Yu; Haruna, Junichi
PTEP, 30 Mar. 2022, Peer-reviewed, Lead author, Corresponding author
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Burgers equation vs. large N limit in TT¯-deformed O(N) vector model
Junichi Haruna; Katsuta Sakai; Kentaroh Yoshida
Nuclear Physics B, Oct. 2021, Peer-reviewed, Lead author, Corresponding author
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Large N analysis of $ T\overline{T} $-deformation and unavoidable negative-norm states
Haruna, Junichi; Ishii, Takaaki; Kawai, Hikaru; Sakai, Katsuta; Yoshida, Kentaroh
JHEP, 21 Apr. 2020, Peer-reviewed, Lead author, Corresponding author

Weak scale from Planck scale: Mass scale generation in a classically conformal two-scalar system
Haruna, Junichi; Kawai, Hikaru
PTEP, 01 Mar. 2020, Peer-reviewed, Lead author, Corresponding author
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Misc.

Quantum Error Correction (lecture note)
Junichi Haruna
New computational methods in quantum field theory 2026 (RIKEN Wako Campus), 26 Jan. 2026

Presentations

Gauge and Homological Structures in Quantum Error Correction
Junichi Haruna
2026 YITP Fault-Tolerant Logical Processing Workshop, Sep. 2026, Invited

Logical gates by gauge field formalism of quantum error correction
Junichi Haruna
JPS 81st Annual Meeting (2026), Sep. 2026

Logical gates by gauge field formalism of quantum error correction
Junichi Haruna
Fields and Strings 2026, Aug. 2026

Gauge and Homological Structures in Quantum Error Correction
Junichi Haruna
Quant HEP 2026, Jul. 2026, Invited

Gauge and Homological Structures in Quantum Error Correction
Junichi Haruna
QASTAL Group Seminar, University College London, Jul. 2026, Invited

Gauge and Homological Structures in Quantum Error Correction
Junichi Haruna
Quantum Computation Group Seminar, RIKEN, Jun. 2026, Invited

Gauge Field Formalism for Logical Gates in Quantum CSS Codes
Junichi Haruna
Quantum Error Correction 2026, Jun. 2026

Gauge and Homological Structures in Quantum Error Correction
Junichi Haruna
CREST HEP-QC One-day Workshop 2026, Apr. 2026, Invited

Logical Gates by Gauge Field Formalism of Quantum Error Correction
Junichi Haruna
CREST HEP-QC Seminar, Dec. 2025, Invited

Logical Gates by Gauge Field Formalism of Quantum Error Correction
Junichi Haruna
Quantum Error Correction Theory Workshop for Young Researchers, Dec. 2025, Invited

ハイパーグラフ積符号と回転表面符号を用いた階層的量子誤り訂正
春名純一
日本物理学会2025年秋季大会, Sep. 2025

Hierarchical Quantum Error Correction with Hypergraph Product Code and Rotated Surface Code
Junichi Haruna
1st Workshop on Fault-Tolerant Quantum Computer System Architecture, Jun. 2025

汎関数くりこみ群とグラディエントフローとその応用
春名純一
琵琶湖畔研究会, Mar. 2025, Invited

Gradient Flow Exact Renormalization Group for Scalar Quantum Electrodynamics
Junichi Haruna
Functional Renormalization Group at Niigata 2024, Jan. 2024, Invited

スカラー場理論におけるグラディエントフロー厳密くりこみ群の固定点構造
春名純一
日本大学理工学部素粒子論研究室コロキウム, Oct. 2023, Invited

Gradient Flow Exact Renormalization Group for Scalar Quantum Electrodynamics and its perturbative analysis
Junichi Haruna
Particle Physics Seminar, Kyushu University, Jul. 2023, Invited

Gradient Flow Exact Renormalization Group and Scalar Field Theories
Junichi Haruna
Functional Renormalization Group at RIKEN 2023, Jan. 2023, Invited

Fixed Point Structure of Gradient Flow Exact Renormalization Group for Scalar Field Theories
Junichi Haruna
11th International Conference on the Exact Renormalization Group 2022, Jul. 2022

グラディエントフロー厳密くりこみ群の固定点構造
春名純一
立教大学素粒子論研究室セミナー, Jun. 2022, Invited

グラディエントフロー厳密くりこみ群の固定点構造
春名純一
九州大学素粒子論研究室セミナー, Mar. 2022, Invited

グラディエントフロー厳密くりこみ群の固定点構造
春名純一
日本物理学会2022年春季大会, Mar. 2022

Fixed Point Structure of Gradient Flow Exact Renormalization Group
Junichi Haruna
Heidelberg University Strongly Correlated Systems Group Seminar, Feb. 2022, Invited

Fixed Point Structure of Gradient Flow Exact Renormalization Group for Scalar Field Theories
Junichi Haruna
YITP Seminar, Feb. 2022, Invited

Fixed Point Structure of Gradient Flow Exact Renormalization Group
Junichi Haruna
KEK Theory workshop 2021, Dec. 2021

リザバー計算機における普遍性
春名純一
日本物理学会2021年秋季大会, Sep. 2021

Burgers Equation vs. Large N Limit in TTbar-deformed O(N) Vector Model
Junichi Haruna
Thermal Field Theory and its Applications 2021, Aug. 2021

Burgers Equation vs. Large N Limit in TTbar-deformed O(N) Vector Model
Junichi Haruna
2021年度原子核三者若手夏の学校, Aug. 2021

Thermodynamics of TT-bar deformed O(N) vector model
Junichi Haruna
日本物理学会2021年春季大会, Mar. 2021

Thermodynamics of TT-bar deformed O(N) vector model
Junichi Haruna
The 15th Kavli Asian Winter School on Strings, Particles and Cosmology, Jan. 2021

Thermodynamics of TT-bar deformed O(N) vector model
Junichi Haruna
KEK Theory workshop 2020, Dec. 2020

Thermodynamics of TT-bar deformed O(N) vector model
Junichi Haruna
Online 2020 NTU-Kyoto high energy physics workshop, Dec. 2020, Invited

Large N Analysis of TTbar-deformation and Unavoidable Negative-norm States
Junichi Haruna
日本物理学会2020年秋季大会, Sep. 2020

Large N Analysis of TTbar-deformation and Unavoidable Negative-norm States
Junichi Haruna
素粒子若手オンライン研究会2020, Aug. 2020

TT-bar deformation in large N limit
Junichi Haruna
Recent Progress on Field and String Theory: Kyoto-NTU 2019, Dec. 2019, Invited

TT-bar deformation in large N limit
Junichi Haruna
KEK Theory workshop 2019, Dec. 2019

TT-bar deformation in large N limit
Junichi Haruna
East Asia Joint Workshop on Fields and Strings 2019 and 12th Taiwan String Theory Workshop, Oct. 2019

Classically conformal Z2×Z2 invariant two scalar modelにおける質量スケールのdynamicalな生成について
春名純一
日本物理学会2019年秋季大会, Sep. 2019

Symmetry Breaking and Phase Transition in Z2 x Z2 Invariant Two Scalar Model
Junichi Haruna
NCTS-Kyoto University Joint Meeting on Recent Advances in String and Quantum Field Theory 2019, Sep. 2019

Coleman-Weinberg 機構が起こる最小限の模型としての Classically conformal Z2 × Z2 invariant two scalar model について
春名純一
2019年度原子核三者若手夏の学校, Aug. 2019

多重臨界点原理と古典共形Z2×Z2不変な実2スカラー系における自発的対称性の破れについて
春名純一
素粒子物理学の進展2019, Jul. 2019

Classically conformal Z2×Z2 invariant two scalar modelにおける質量スケールのdynamicalな生成について
春名純一
関西地域セミナー2019, Jul. 2019

S行列のあり得る対称性について
春名純一
2018年度原子核三者若手夏の学校, Aug. 2018

Works

Data and Code for "Hierarchical Quantum Error Correction with Hypergraph Product Code and Rotated Surface Code"
Junichi Haruna; Keisuke Fujii
From 21 Jun. 2025

PIReservoir: Numerical Code for the Path Integral Approach to Reservoir Computers
Junichi Haruna
From 12 Jan. 2023

bockstein-gate-check: Feasibility checker for transversal diagonal logical gates in CSS codes
Junichi Haruna
From 11 Aug. 2026

GLMCC（神経スパイク相互相関解析のためのPythonコード）
春名純一, 篠本滋, 小林亮太
From 12 Aug. 2026

Awards

18 Sep. 2023
素粒子メダル奨励賞（日本物理学会素粒子論グループ）

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