Publications

1. O. Morikawa and S. Ogawa,

``Exact WKB method for radial Schrödinger equation,''

arXiv:2510.11766 [quant-ph] [INSPIRE].

2. S. Onoda, O. Fukushima, R. Hamazaki and O. Morikawa,

``Eigenstate Thermalization Hypothesis with Projective Representation,''

arXiv:2509.01931 [hep-th] [INSPIRE].

3. O. Morikawa and S. Ogawa,

``On continuum and resonant spectra from exact WKB analysis,''

arXiv:2508.09211 [quant-ph] [INSPIRE].

4. O. Morikawa and S. Ogawa,

``Unified exact WKB framework for resonance -- Zel'dovich and complex-scaling regularizations,''

JHEP 10, 49 (2025) [arXiv:2505.02301 [hep-th]] [INSPIRE].

5. O. Morikawa and S. Ogawa,

``Nonperturbative Formulation of Resonances in Quantum Mechanics Based on Exact WKB Method,''

PTEP 2025, no.10, 103B01 (2025) [arXiv:2503.18741 [hep-th]] [INSPIRE].

6. O. Morikawa and H. Suzuki,

``Direct Monte Carlo computation of the 't Hooft partition function,''

PTEP 2025, no.6, 063B04 (2025) [arXiv:2501.07042 [hep-lat]] [INSPIRE].

7. M. Abe, O. Morikawa and H. Suzuki,

``Monte Carlo simulation of the SU(2)/Z_2 Yang-Mills theory,''

PTEP 2025, no.6, 063B03 (2025) [arXiv:2501.00286 [hep-lat]] [INSPIRE].

8. O. Morikawa and H. Suzuki,

``Winding number on 3D lattice,''

arXiv:2412.03888 [hep-lat] [INSPIRE].

1. O. Morikawa, S. Onoda and H. Suzuki,

``Yet another lattice formulation of 2D U(1) chiral gauge theory via bosonization,''

PTEP 2024, no.6, 063B01 (2024) [arXiv:2403.03420 [hep-lat]] [INSPIRE].

2. Y. Honda, O. Morikawa, S. Onoda and H. Suzuki,

``Lattice realization of the axial U(1) non-invertible symmetry,''

PTEP 2024, no.4, 043B04 (2024) [arXiv:2401.01331 [hep-lat]] [INSPIRE].

3. M. Abe, O. Morikawa, S. Onoda, H. Suzuki and Y. Tanizaki,

``Magnetic operators in 2D compact scalar field theories on the lattice,''

PTEP 2023, no.7 073B01 (2023) [arXiv:2304.14815 [hep-lat]] [INSPIRE].

4. M. Abe, O. Morikawa and S. Onoda,

``Note on lattice description of generalized symmetries in SU(N)/Z_N gauge theories,''

PRD 108, 014506 (2023) [arXiv:2304.11813 [hep-th]] [INSPIRE].

5. M. Abe, O. Morikawa, S. Onoda, H. Suzuki and Y. Tanizaki,

``Topology of SU(N) lattice gauge theories coupled with Z_N 2-form gauge fields,''

JHEP 08, 118 (2023) [arXiv:2303.10977 [hep-lat]] [INSPIRE].

6. N. Kan, O. Morikawa, Y. Nagoya and H. Wada,

``Higher-group structure in lattice Abelian gauge theory under instanton-sum modification,''

EPJC 83, no.6, 481 (2023) [arXiv:2302.13466 [hep-th]] [INSPIRE],

Erratum: EPJC 84, no.1, 22 (2024).

7. O. Morikawa, H. Wada and S. Yamaguchi,

``Phase structure of linear quiver gauge theories from anomaly matching,''

PRD 107, 045020 (2023) [arXiv:2211.12079 [hep-th]] [INSPIRE].

8. M. Abe, O. Morikawa and H. Suzuki,

``Fractional topological charge in lattice Abelian gauge theory,''

PTEP 2023, no.2, 023B03 (2023) [arXiv:2210.12967 [hep-th]] [INSPIRE].

1. M. Ashie, O. Morikawa, H. Suzuki and H. Takaura,
   ``More on the infrared renormalon in SU(N) QCD(adj.) on R^3xS^1,''
   PTEP 2020, no.9, 093B02 (2020) [arXiv:2005.07407 [hep-th]] [INSPIRE].

2. O. Morikawa and H. Takaura,
   ``Identification of perturbative ambiguity canceled against bion,''
   PLB 807, 135570 (2020) [arXiv:2003.04759 [hep-th]] [INSPIRE].

3. K. Ishikawa, O. Morikawa, K. Shibata and H. Suzuki,
   ``Vacuum energy of the supersymmetric CP^{N-1} model on RxS^1 in the 1/N expansion,''
   PTEP 2020, no.6, 063B02 (2020) [arXiv:2001.07302 [hep-th]] [INSPIRE].

4. K. Ishikawa, O. Morikawa, K. Shibata, H. Suzuki and H. Takaura,
   ``Renormalon structure in compactified spacetime,''
   PTEP 2020, no.1, 013B01 (2020) [arXiv:1909.09579 [hep-th]] [INSPIRE].

5. M. Ashie, O. Morikawa, H. Suzuki, H. Takaura and K. Takeuchi,
   ``Infrared renormalon in SU(N) QCD(adj.) on R^3xS^1,''
   PTEP 2020, no.2, 023B01 (2020) [arXiv:1909.05489 [hep-th]] [INSPIRE].

6. K. Ishikawa, O. Morikawa, A. Nakayama, K. Shibata, H. Suzuki and H. Takaura,
   ``Infrared renormalon in the supersymmetric CP^{N-1} model on RxS^1,''
   PTEP 2020, no.2, 023B10 (2020) [arXiv:1908.00373 [hep-th]] [INSPIRE].

7. O. Morikawa,
   ``Continuum limit in numerical simulations of the N=2 Landau-Ginzburg model,''
   PTEP 2019, no.10, 103B03 (2019) [arXiv:1906.00653 [hep-lat]] [INSPIRE].

8. O. Morikawa,
   ``Numerical study of the N=2 Landau-Ginzburg model with two superfields,''
   JHEP 12, 045 (2018) [arXiv:1810.02519 [hep-lat]] [INSPIRE].

9. A. Kasai, O. Morikawa and H. Suzuki,
   ``Gradient flow representation of the four-dimensional N=2 super Yang-Mills supercurrent,''
   PTEP 2018, no.11, 113B02 (2018) [arXiv:1808.07300 [hep-lat]] [INSPIRE].

10. O. Morikawa and H. Suzuki,
    ``Numerical study of the N=2 Landau-Ginzburg model,''
    PTEP 2018, no.8, 083B05 (2018) [arXiv:1805.10735 [hep-lat]] [INSPIRE].

11. O. Morikawa and H. Suzuki,
    ``Axial U(1) anomaly in a gravitational field via the gradient flow,''
    PTEP 2018, no.7, 073B02 (2018) [arXiv:1803.04132 [hep-th]] [INSPIRE].

12. H. Makino, O. Morikawa and H. Suzuki,
    ``Gradient flow and the Wilsonian renormalization group flow,''
    PTEP 2018, no.5, 053B02 (2018) [arXiv:1802.07897 [hep-th]] [INSPIRE],

Erratum: PTEP 2021, no.9, 099201 (2021) [INSPIRE].

13. H. Makino, O. Morikawa and H. Suzuki,
    ``One-loop perturbative coupling of A and A_★ through the chiral overlap operator,''
    PTEP 2017, no.6, 063B08 (2017) [arXiv:1704.04862 [hep-lat]] [INSPIRE].

14. H. Makino and O. Morikawa,
    ``Lorentz symmetry violation in the fermion number anomaly with the chiral overlap operator,''
    PTEP 2016, no.12, 123B06 (2016) [arXiv:1609.08376 [hep-lat]] [INSPIRE].

1. O. Morikawa, S. Onoda and H. Suzuki,

``Novel Lattice Formulation of 2D Chiral Gauge Theory via Bosonization,''

PoS LATTICE2024, 363 (2025) [arXiv:2501.18949 [hep-lat]] [INSPIRE].

Talk presented at the 41st International Symposium on Lattice Field Theory (Lattice2024), July 28th - August 3rd, 2024, The University of Liverpool.

2. M. Abe and O. Morikawa,

``Numerical simulation of fractional topological charge in SU(N) gauge theory coupled with Z_N 2-form gauge fields,''

PoS LATTICE2024, 380 (2025) [arXiv:2501.11438 [hep-lat]] [INSPIRE].

Talk presented at the 41st International Symposium on Lattice Field Theory (Lattice2024), July 28th - August 3rd, 2024, The University of Liverpool.

3. O. Morikawa, M. Tanaka, M. Kitazawa and H. Suzuki,

``Lattice study of RG fixed point based on gradient flow in 3D O(N) sigma model,''

PoS LATTICE2024, 349 (2025) [arXiv:2410.19425 [hep-lat]] [INSPIRE].

Talk presented at the 41st International Symposium on Lattice Field Theory (Lattice2024), July 28th - August 3rd, 2024, The University of Liverpool.

4. M. Abe, O. Morikawa, S. Onoda, H. Suzuki and Y. Tanizaki,

``Lattice construction of mixed 't Hooft anomaly with higher form symmetry,''

PoS LATTICE2023, 361 (2024) [arXiv:2401.00495 [hep-lat]] [INSPIRE].

Talk presented at the 40th International Symposium on Lattice Field Theory (Lattice2023), July 31st - August 4th, 2023, Fermi National Accelerator Laboratory.

5. M. Abe, N. Kan, O. Morikawa, Y. Nagoya, S. Onoda and H. Wada,

``Higher-group symmetry in lattice gauge theories with restricted topological sectors,''

PoS LATTICE2023, 365 (2024) [arXiv:2310.01787 [hep-lat]] [INSPIRE].

Talk presented at the 40th International Symposium on Lattice Field Theory (Lattice2023), July 31st - August 4th, 2023, Fermi National Accelerator Laboratory.

6. O. Morikawa,
   ``Numerical study of ADE-type N=2 Landau-Ginzburg models,''
   PoS LATTICE2019, 145 (2020) [arXiv:1908.03411 [hep-lat]] [INSPIRE].
   Talk presented at the 37th International Symposium on Lattice Field Theory (Lattice2019), 16-22 June 2019, Wuhan, China.

7. H. Makino, O. Morikawa and H. Suzuki,
   ``One-loop perturbative coupling of A and A_★ through the chiral overlap operator,''
   EPJ Web Conf. 175, 11013 (2018) [arXiv:1710.00536 [hep-lat]] [INSPIRE].
   Talk presented at the 35th International Symposium on Lattice Field Theory (Lattice2017), 18-24 June 2017, Granada, Spain.

Advisor: Prof. Hiroshi Suzuki

• Mar. 2021: PhD thesis
  ``Numerical study of infrared criticality of the supersymmetric Landau-Ginzburg model''
  「超対称ランダウ・ギンツブルグ模型の赤外臨界点の数値的研究」

[Kyushu U. Doctoral Dissertation Database] [DOI] [INSPIRE] [pdf@GoogleDrive]

• Mar. 2018: Master thesis
  「2次元超対称Landau-Ginzburg模型における低エネルギー臨界現象の数値的研究」

[thesis&abstract-pdf@GoogleDrive (w/ passwd)]

(修士学生の方：原稿&概要TeXテンプレート(日本語)を利用可)

1. O. Morikawa,

``ErrorEst.jl,''

GitHub: Tools for julia programming of statistical analysis, 2024 (link)

2. O. Morikawa,

``HigherCup,''

GitHub: Symbolic manipulation of Steenrod higher cups, 2024 (link)

3. O. Morikawa,

``Wind3D,''

GitHub: Discrete approximation to 3D winding number mapping T^3->U(N), 2024 (link).

4. A. Tomiya, Y. Nagai, et. al.

``akio-tomiya/Gaugefields.jl v0.4.0,''

GitHub: Julia package for utilities of gauge fields, 2024 (link).

• O. Morikawa,

``HigherBfields.jl (forked from akio-tomiya/Gaugefields.jl),''

GitHub: Julia package for utilities of gauge fields coupled with higher-form gauge fields, 2024 (link).

5. O. Morikawa,

``Gaugefields.jl,''

GitHub: Julia package for utilities of quantum theory of (higher-form) general gauge fields, 2024 (link).

6. O. Morikawa,

``Resummation,''

GitHub: Mathematica codes for some resummation techniques based on perturbation theory, 2022 (link).

7. O. Morikawa,

``LandauGinzburg,''

GitHub: C++ and Julia codeset for simulation of N=2 Landau-Ginzburg model, 2021 (link).

1. Okuto Morikawa, Shoya Ogawa

``Unified exact WKB framework for quantum mechanical resonance''

2. Takahiro Fukui, Okuto Morikawa, Hiroshi Suzuki

``Gradient flow for winding numbers in real-space representation''

3. Osamu Fukushima, Ryusuke Hamazaki, Okuto Morikawa, Soma Onoda

``Eigenstate Thermalization Hypothesis with Projective Representation''

4. Okuto Morikawa,

``Lattice non-perturbative understanding of generalized symmetries and applications''

5. Okuto Morikawa, Shoya Ogawa

``Non-perturbative formulation of quasi-stationary resonant state based on exact WKB method''

[J-Global]

6. Okuto Morikawa, Soma Onoda, Hiroshi Suzuki

``Yet another lattice formulation of 2D U(1) chiral gauge theory via bosonization''

[J-Global]

7. Okuto Morikawa

``Studies on generalized symmetries in lattice field theory''

[J-Global]

8. Motokazu Abe, Naoto Kan, Okuto Morikawa, Yuta Nagoya, Soma Onoda, Hiroki Wada

``Higher-group symmetry in lattice gauge theories with restriction of instanton numbers''

[J-Global]

9. Motokazu Abe, Okuto Morikawa, Soma Onoda, Hiroshi Suzuki, Yuya Tanizaki

``Lattice formulation of magnetic operators in 2D compact scalar theories''

[J-Global]

10. Motokazu Abe, Okuto Morikawa, Soma Onoda, Hiroshi Suzuki, Yuya Tanizaki

``Fractional topological charge in 4d lattice SU(N) gauge theory''

[J-Global]

11. Okuto Morikawa, Hiroki Wada, Satoshi Yamaguchi

``Constraints on the phase structure of linear quiver gauge theories from anomalies for one-form symmetries''

[J-Global]

12. Mizuki Tanaka, Masakiyo Kitazawa, Okuto Morikawa, Hiroshi Suzuki

``Analysis of Fixed Point in 3-Dimensional O(N) Scalar Model Using Gradient Flow''

[J-Global]

13. Okuto Morikawa, Hiromasa Takaura

``Identification of perturbative ambiguity canceled against bion''

[J-Global]

14. Okuto Morikawa

``Continuum extrapolation and precision measurement of the scaling dimension in the N=2 Landau-Ginzburg model''

[DOI] [J-Global]