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(Faculty Division of Natural Sciences Research Group of Physics)｜Researchers' Profile Teacher performance management system

TAKAHASHI Tomohiko

Faculty Division of Natural Sciences Research Group of PhysicsProfessor
Last Updated :2025/06/13

■researchmap

Profile Information

  • Name (Japanese)

    Takahashi

  • Name (Kana)

    Tomohiko

Research Interests

  • 弦の場の理論
  • 弦理論
  • 素粒子論
  • Theoretical Particle Physics

Research Areas

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

Research History

  • Apr. 2019 - Present, Nara Women's University, Faculty, Division of Natural Sciences, 教授
  • Apr. 2012 - Mar. 2019, Nara Women's University, Faculty, Division of Natural Sciences, 准教授
  • Dec. 2010 - Mar. 2012, Nara Women's University, Faculty of Science, 准教授
  • Apr. 2007 - Oct. 2010, Nara Women's University, Faculty of Science, 助教
  • Apr. 2000 - Mar. 2007, Nara Women's University, Faculty of Science, 助手
  • Apr. 1997 - Mar. 2000, 日本学術振興会特別研究員 (PD・東京大学)

Education

  • Apr. 1992 - Mar. 1997, 京都大学大学院, 理学研究科, Japan
  • Apr. 1988 - Mar. 1992, Kobe University, Faculty of Science

Professional Memberships

  • 日本物理学会

Social Activities

  • 10 Jan. 2021 - 10 Jan. 2021
  • 26 Nov. 2020 - 26 Nov. 2020
  • 30 Oct. 2020 - 07 Nov. 2020
  • 10 Jan. 2020 - 10 Jan. 2020
  • 09 Nov. 2019 - 10 Nov. 2019
  • 20 Jul. 2019
  • 16 Jun. 2018
  • 17 Jun. 2017
  • Nov. 2015
  • 07 Jun. 2014 - 08 Jun. 2014
  • 19 Oct. 2013
  • 29 Sep. 2012

■Ⅱ．研究活動実績

Published Papers

  • Refereed, Nuclear Physics B, Elsevier BV, Closed string vertex operators with various ghost number, Isao Kishimoto; Mako Kouga; Shigenori Seki; Tomohiko Takahashi, Apr. 2024, 116549, 116549, Scientific journal, 10.1016/j.nuclphysb.2024.116549
    DOI URL
  • Refereed, Physics Letters B, Elsevier BV, Two-point closed string amplitudes in the BRST formalism, Isao Kishimoto; Shigenori Seki; Tomohiko Takahashi, Apr. 2024, 138657, 138657, Scientific journal, 10.1016/j.physletb.2024.138657
    DOI URL
  • Refereed, Nuclear Physics B, Elsevier BV, The Veneziano amplitude via mostly BRST exact operator, Isao Kishimoto; Tomoko Sasaki; Shigenori Seki; Tomohiko Takahashi, Jan. 2022, 974, 115647, 115647, Scientific journal, 10.1016/j.nuclphysb.2021.115647
    DOI URL
  • Refereed, Physics Letters B, Elsevier BV, Reduction of open string amplitudes by mostly BRST exact operators, Shigenori Seki; Tomohiko Takahashi, Nov. 2021, 822, 136664, 136664, Scientific journal, 10.1016/j.physletb.2021.136664
    DOI URL
  • Refereed, Journal of High Energy Physics, Springer Science and Business Media LLC, Numerical twist-even SU(1,1)-singlet solutions in open string field theory around the identity-based solution, Isao Kishimoto; Tomohiko Takahashi, A<sc>bstract</sc><br/>Using the level truncation method, we construct numerical solutions, which are twist even and SU(1) singlet, in the theory around the Takahashi-Tanimoto identity-based solution (TT solution) with a real parameter a in the framework of bosonic open string field theory. We find solutions corresponding to “double brane” and “ghost brane” solutions which were constructed by Kudrna and Schnabl in the conventional theory around the perturbative vacuum. Our solutions show somewhat similar a-dependence to tachyon vacuum and single brane solutions, which we found in the earlier works. In this sense, we might be able to expect that they are consistent with the conventional interpretation of a-dependence of the TT solution. We observe that numerical complex solutions at low levels become real ones at higher levels for some region of the parameter a. However, these real solutions do not so improve interpretation for double brane., Feb. 2021, 2021, 2, Scientific journal, 10.1007/jhep02(2021)133
    URLDOI URL
  • Refereed, Physical Review D, American Physical Society (APS), Supersymmetric nonlinear sigma models as anomalous gauge theories, Aya Kondo; Tomohiko Takahashi, 16 Jul. 2020, 102, 2, Scientific journal, 10.1103/physrevd.102.025014
    URLDOI URL
  • Refereed, Phys. Lett. B, Volume 800, 135078 [arXiv:1909.03672], Two-point String Amplitudes Revisited by Operator Formalism, Shigenori Seki; Tomohiko Takahashi, So far we have considered that a two-point string amplitude vanishes due to
    the infinite volume of residual gauge symmetry. However recently
    Erbin-Maldacena-Skliros have suggested that the two-point amplitude can have
    non-zero value, because one can cancel the infinite volume by the infinity
    coming from on-shell energy conservation. They derived the two-point function
    by Fadeev-Popov method. In this paper we revisit this two-point string
    amplitude in the operator formalism. We find the mostly BRST exact operator
    which yields non-zero two-point amplitudes., 09 Sep. 2019, Scientific journal, 10.1016/j.physletb.2019.135078
    DOI URL
  • Refereed, Closed string symmetries in open string field theory, I. Kishimoto; T. Kitade; T. Takahashi, Dec. 2018, 123B04, Scientific journal, 10.1093/ptep/pty125
    DOI URL
  • Refereed, Journal of High Energy Physics, Springer Verlag, Vector profile and gauge invariant observables of string field theory solutions for constant magnetic field background, Nobuyuki Ishibashi; Isao Kishimoto; Toru Masuda; Tomohiko Takahashi, 01 May 2018, 2018, 5, 144, Scientific journal, 10.1007/JHEP05(2018)144
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, String field theory solution corresponding to constant background magnetic field, Nobuyuki Ishibashi; Isao Kishimoto; Tomohiko Takahashi, Jan. 2017, 013B06, 1, Scientific journal, 10.1093/ptep/ptw185
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Open string fields as matrices, Isao Kishimoto; Toru Masuda; Tomohiko Takahashi; Shoko Takemoto, Mar. 2015, 033B05, 3, Scientific journal, 10.1093/ptep/ptv023
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Observables for identity-based tachyon vacuum solutions, Isao Kishimoto; Toru Masuda; Tomohiko Takahashi, Oct. 2014, 103B02, 10, Scientific journal, 10.1093/ptep/ptu136
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Comments on observables for identity-based marginal solutions in Berkovits' superstring field theory, Isao Kishimoto; Tomohiko Takahashi, Jul. 2014, 07(2014)031, 7, Scientific journal, 10.1007/JHEP07(2014)031
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Numerical solutions of open string field theory in marginally deformed backgrounds, Isao Kishimoto; Tomohiko Takahashi, Sep. 2013, 2013, 9, Scientific journal, 10.1093/ptep/ptt072
    DOI URL
  • Refereed, Progress of Theoretical and Experimental Physics, Gauge invariant overlaps for identity-based marginal solutions, Isao Kishimoto; Tomohiko Takahashi, Sep. 2013, 2013, 9, Scientific journal, 10.1093/ptep/ptt073
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, Tachyon vacuum of bosonic open string field theory in marginally deformed backgrounds, Shoko Inatomi; Isao Kishimoto; Tomohiko Takahashi, Feb. 2013, 2013, 2, 023B02, Scientific journal, 10.1093/ptep/pts070
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, On nontrivial solutions around a marginal solution in cubic superstring field theory, Shoko Inatomi; Isao Kishimoto; Tomohiko Takahashi, Dec. 2012, 12(2012), 12, 071, Scientific journal, 10.1007/JHEP12(2012)071
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Homotopy Operators and One-Loop Vacuum Energy at the Tachyon Vacuum, Shoko Inatomi; Isao Kishimoto; Tomohiko Takahashi, Dec. 2011, 126, 6, 1077, 1089, Scientific journal, 10.1143/PTP.126.1077
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Homotopy operators and identity-based solutions in cubic superstring field theory, Shoko Inatomi; Isao Kishimoto; Tomohiko Takahashi, Oct. 2011, 2011, 10, 114, Scientific journal, 10.1007/JHEP10(2011)114
    DOI URL
  • Not Refereed, PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, A Vacuum Loop of an Open String around an Identity-Based Solution, Tomohiko Takahashi, 2011, 188, 188, 163, 168, Scientific journal, 10.1143/PTPS.188.163
    DOI URL
  • Refereed, THEORETICAL AND MATHEMATICAL PHYSICS, Exploring the vacuum structure near identity-based solutions, I. Kishimoto; T. Takahashi, Jun. 2010, 163, 3, 717, 724, Scientific journal, 10.1007/s11232-010-0055-x
    DOI URL
  • Refereed, THEORETICAL AND MATHEMATICAL PHYSICS, Numerical evaluation of gauge invariants for a-gauge solutions in open string field theory, I. Kishimoto; T. Takahashi, Jun. 2010, 163, 3, 710, 716, Scientific journal, 10.1007/s11232-010-0054-y
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Vacuum Structure around Identity-Based Solutions, Isao Kishimoto; Tomohiko Takahashi, Aug. 2009, 122, 2, 385, 399, Scientific journal, 10.1143/PTP.122.385
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Numerical Evaluation of Gauge Invariants for a-Gauge Solutions in Open String Field Theory, Isao Kishimoto; Tomohiko Takahashi, Apr. 2009, 121, 4, 695, 710, Scientific journal, 10.1143/PTP.121.695
    DOI URL
  • Refereed, NUCLEAR PHYSICS B, Gauge invariant overlaps for classical solutions in open string field theory, Teruhiko Kawano; Isao Kishimoto; Tomohiko Takahashi, Nov. 2008, 803, 1-2, 135, 165, Scientific journal, 10.1016/j.nuclphysb.2008.05.025
    DOI URL
  • Refereed, PHYSICS LETTERS B, Schnabl's solution and boundary states in open string field theory, Teruhiko Kawano; Isao Kishimoto; Tomohiko Takahashi, Nov. 2008, 669, 5, 357, 358, Scientific journal, 10.1016/j.physletb.2008.10.002
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Level truncation analysis of exact solutions in open string field theory, Tomohiko Takahashi, Jan. 2008, 0801, 1, 001, Scientific journal, 10.1088/1126-6708/2008/01/001
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Analytical tachyonic lump solutions in open superstring field theory, Kishimoto, I; T Takahashi, Jan. 2006, 0601, 1, 013, Scientific journal, 10.1088/1126-6708/2006/01/013
    DOI URL
  • Refereed, Progress of Theoretical Physics, Exploring vacuum manifold of open string field theory, Yuji Igarashi; Katsumi Itoh; Fumie Katsumata; Tomohiko Takahashi; Syoji Zeze, Dec. 2005, 114, 6, 1269, 1293, Scientific journal, 10.1143/PTP.114.1269
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Marginal deformations and classical solutions in open superstring field theory, Kishimoto, I; T Takahashi, Nov. 2005, 0511, 11, 051, Scientific journal, 10.1088/1126-6708/2005/11/051
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Classical solutions and order of zeros in open string field theory, Y Igarashi; K Itoh; F Katsumata; T Takahashi; S Zeze, Sep. 2005, 114, 3, 695, 706, Scientific journal, 10.1143/PTP.114.695
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Marginal deformations and closed string couplings in open string field theory, F Katsumata; T Takahashi; S Zeze, Nov. 2004, 0411, 11, 050, Scientific journal, 10.1088/1126-6708/2004/11/050
    DOI URL
  • Refereed, NUCLEAR PHYSICS B, Tachyon condensation and universal solutions in string field theory, T Takahashi, Oct. 2003, 670, 1-2, 161, 182, Scientific journal, 10.1016/j.nuclphysb.2003.08.007
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Closed string amplitudes in open string field theory, T Takahashi; S Zeze, Aug. 2003, 0308, 8, Scientific journal, 10.1088/1126-6708/2003/08/020
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Gauge fixing and scattering amplitudes in string field theory expanded around universal solutions, T Takahashi; S Zeze, Jul. 2003, 110, 1, 159, 177, Scientific journal, 10.1143/PTP.110.159
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Open string field theory around universal solutions, Kishimoto, I; T Takahashi, Sep. 2002, 108, 3, 591, 602, Scientific journal, 10.1143/PTP.108.591
    DOI URL
  • Refereed, JOURNAL OF HIGH ENERGY PHYSICS, Marginal and scalar solutions in cubic open string field theory, T Takahashi; S Tanimoto, Mar. 2002, 0203, 3, 033, Scientific journal, 10.1088/1126-6708/2002/03/033
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Wilson lines and classical solutions in cubic open string field theory, T Takahashi; S Tanimoto, Oct. 2001, 106, 4, 863, 872, Scientific journal, 10.1143/PTP.106.863
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Open-closed string field theory in a background B field, T Kawano; T Takahashi, Dec. 2000, 104, 6, 1267, 1287, Scientific journal, 10.1143/PTP.104.1267
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Open string field theory on noncommutative space, T Kawano; T Takahashi, Aug. 2000, 104, 2, 459, 476, Scientific journal, 10.1143/PTP.104.459
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, One-loop tachyon amplitude in unoriented open-closed string field theory, T Asakawa; T Kugo; T Takahashi, Aug. 1999, 102, 2, 427, 466, Scientific journal, 10.1143/PTP.102.427
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, BRS invariance of unoriented open-closed string field theory, T Asakawa; T Kugo; T Takahashi, Oct. 1998, 100, 4, 831, 879, Scientific journal, 10.1143/PTP.100.831
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, On the generalized gluing and resmoothing theorem, T Asakawa; T Kugo; T Takahashi, Aug. 1998, 100, 2, 437, 454, Scientific journal, 10.1143/PTP.100.437
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Unoriented open-closed string field theory, T Kugo; T Takahashi, Apr. 1998, 99, 4, 649, 689, Scientific journal, 10.1143/PTP.99.649
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Duality of a supersymmetric model with the Pati-Salam group, N Maekawa; T Takahashi, Jun. 1996, 95, 6, 1167, 1172, Scientific journal, 10.1143/PTP.95.1167
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, Conformal anomaly of string theory in the harmonic gauge, T Takahashi, May 1996, 95, 5, 995, 1005, Scientific journal, 10.1143/PTP.95.995
    DOI URL
  • Refereed, PHYSICAL REVIEW D, POSSIBLE CANDIDATES FOR A SUPERSYMMETRIC SO(10) MODEL WITH AN INTERMEDIATE SCALE, M BANDO; J SATO; T TAKAHASHI, Sep. 1995, 52, 5, 3076, 3080, Scientific journal, 10.1103/PhysRevD.52.3076
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, HIERARCHICAL MASS MATRICES IN A MINIMAL SO(10) GRAND UNIFICATION .2., M BANDO; KI IZAWA; T TAKAHASHI, Dec. 1994, 92, 6, 1137, 1147, Scientific journal, 10.1143/ptp/92.6.1137
    DOI URL
  • Refereed, PROGRESS OF THEORETICAL PHYSICS, HIERARCHICAL MASS MATRICES IN A MINIMAL SO(10) GRAND UNIFICATION .1., M BANDO; KI IZAWA; T TAKAHASHI, Jul. 1994, 92, 1, 143, 151, Scientific journal, 10.1143/ptp/92.1.143
    DOI URL
  • Feb. 2021, 02, 133, 1, 26, https://doi.org/10.1007/JHEP02(2021)133

MISC

  • Not Refereed, Oct. 2017, 131, 134
  • Not Refereed, Oct. 2017, 73, 76
  • Not Refereed, Mar. 2017
  • Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 20pAK-9 Closed string disk amplitudes in open string field theory, Takahashi Tomohiko; Tsugawa Shiori, 2016, 71, 38, 38, 10.11316/jpsgaiyo.71.1.0_38
    DOI URL
  • Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan, Classical solutions for gauge field condensation in open string field theories, Ishibashi Nobuyuki; Kishimoto Isao; Takahashi Tomohiko, 2016, 71, 23, 23, 10.11316/jpsgaiyo.71.2.0_23
    DOI URL
  • Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 23pDA-13 Multi-Brane Solutions and Chan-Paton Factors, Kishimoto I.; Masuda T.; Takahashi T.; Takemoto S., 2015, 70, 30, 30, 10.11316/jpsgaiyo.70.1.0_30
    DOI URL
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 18aSF-6 Observables for identity-based tachyon vacuum solutions, Kishimoto Isao; Masuda Toru; Takahashi Tomohiko, 22 Aug. 2014, 69, 2, 6, 6
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 27pSC-4 Gauge invariant overlaps for identity-based marginal solutions in superstring field theories, Kishimoto Isao; Takahashi Tomohiko, 05 Mar. 2014, 69, 1, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), Gauge invariant orverlaps for indentity-based marginal solutions, Kishimoto Isao; Takahashi Tomohiko, 26 Aug. 2013, 68, 2, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 27aRB-2 On Nontrivial Solutions around a Marginal Solution in Superstring Field Theory, Inatomi Shoko; Kishimoto Isao; Takahashi Tomohiko, 26 Mar. 2013, 68, 1, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 27aRB-1 Numerical solutions in string field theory around identity-based marginal solutions, Kishimoto Isao; Takahashi Tomohiko, 26 Mar. 2013, 68, 1, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 12aSF-5 Tachyon vacuum in marginally deformed backgrounds, Inatomi Shoko; Kishimoto Isao; Takahashi Tomohiko, 24 Aug. 2012, 67, 2, 5, 5
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 25pKA-10 Homotopy Operators and Identity Based Solutions in Superstring Field Theory, Inatomi Shoko; Kishimoto Isao; Takahashi Tomohiko, 05 Mar. 2012, 67, 1, 13, 13
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 26pGC-4 Symmetry of the tachyon vacuum in string field theory, Inatomi S.; Takahashi T., 03 Mar. 2011, 66, 1, 9, 9
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 26pGC-2 Vacuum loop of an open string on the tachyon vacuum, Inatomi S.; Kishimoto I.; Saito Y.; Takahashi T., 03 Mar. 2011, 66, 1, 9, 9
  • Progress of theoretical physics, Proceedings of the international conference on String Field Theory and Related Aspects (SFT2010), 2011, 125, 1, 279,巻頭2p,図巻頭1枚,巻頭1,巻末5〜9
  • Progress of theoretical physics. Supplement, Progress of Theoretical Physics, Preface(String Field Theory and Related Aspects (SFT2010)) :, Kishimoto Isao; Kunitomo Hiroshi; Takahashi Tomohiko, 2011, 188, i
  • Not Refereed, PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, Proceedings of the International Conference on String Field Theory and Related Aspects (SFT2010) October 18-22, 2010, Kyoto, Japan Preface, Isao Kishimoto; Hiroshi Kunitomo; Tomohiko Takahashi, 2011, 188, I, I, Others
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 11pSC-6 Mass spectrum around classical solutions in string field theory, Inatomi S.; Kishimoto I.; Saito Y.; Takahashi T., 18 Aug. 2010, 65, 2, 3, 3
  • Not Refereed, 2010, 65, 6, Book review
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 11aSH-2 Vacuum structure around identity based solutions in open string field theory, Kishimoto Isao; Takahashi Tomohiko, 18 Aug. 2009, 64, 2, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 23pSP-5 Numerical evaluation of gauge invariants in the Asano-Kato gauge, Kishimoto Isao; Takahashi Tomohiko, 25 Aug. 2008, 63, 2, 15, 15
  • Not Refereed, 2008
  • Not Refereed, Meeting Abstracts of the Physical Society of Japan, 一般社団法人 日本物理学会, 26aZA-4 Evaluation of gauge invariants for the Schnabl's solution, Kawano Teruhiko; Kishimoto Isao; Kugo Taichiro; Takahashi Tomohiko, 2008, 63, 0, 14, 14
  • Not Refereed, Dec. 2007
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 28aWP-11 Analytical Tachyonic Lump Solutions in Open Superstring Field Theory, Kishimoto Isao; Takahashi Tomohiko, 04 Mar. 2006, 61, 1, 7, 7
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 28aWP-10 Vacuum structure in string field theory around Wilson line solutions, Kishimoto Isao; Takahashi Tomohiko, 04 Mar. 2006, 61, 1, 6, 6
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 12aSD-9 Gauge fixing and Classical Solution in String Field Theory, Igarashi Yuji; Itoh Katsumi; Katsumata Fumie; Takahashi Tomohiko; Zeze Syoji, 19 Aug. 2005, 60, 2, 1, 1
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 12aSD-11 Marginal Deformations and Classical Solutions, Kishimoto Isao; Takahashi Tomohiko, 19 Aug. 2005, 60, 2, 1, 1
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 24aYD-10 Classcical Solutions in String Field Theory, Igarashi Yuji; Itoh Katsumi; Katsumata Fumie; Takahashi Tomohiko; Zeze Syoji, 04 Mar. 2005, 60, 1, 2, 2
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 24aYD-11 Global Symmetry and Classcical Solutions in String Field Theory, Igarashi Yuji; Itoh Katsumi; Katsumata Fumie; Takahashi Tomohiko; Zeze Syoji, 04 Mar. 2005, 60, 1, 2, 2
  • Not Refereed, Feb. 2005, 4, 39
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 29pZF-6 Closed String Amplitudes in Open String Field Theory, Takahashi Tomohiko; Zeze Syoji, 03 Mar. 2004, 59, 1, 7, 7
  • Not Refereed, Mar. 2003
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 13pRD-14 Open String Field Theory around Universal Solutions, Kishimoto Isao; Takahashi Tomohiko, 13 Aug. 2002, 57, 2, 6, 6
  • Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), Various Classical Solutions in String Field Theory, Takahashi Tomohiko, 13 Aug. 2002, 57, 2, 3, 3
  • 19 Mar. 2020, 4月号

Presentations

  • 18 Mar. 2025, 18 Mar. 2025 - 21 Mar. 2025
  • 17 Sep. 2024, 16 Sep. 2024 - 19 Sep. 2024
  • Oral presentation, 19 Mar. 2024, 18 Mar. 2024 - 21 Mar. 2024
  • Oral presentation, 19 Mar. 2024, 18 Mar. 2024 - 21 Mar. 2024
  • Oral presentation, 18 Sep. 2023, 16 Sep. 2023 - 19 Sep. 2023
  • Oral presentation, 18 Sep. 2023, 16 Sep. 2023 - 19 Sep. 2023
  • Oral presentation, 25 Mar. 2023, 22 Mar. 2023 - 25 Mar. 2023
  • Oral presentation, 25 Mar. 2023, 22 Mar. 2023 - 25 Mar. 2023
  • Oral presentation, 06 Sep. 2022, 06 Sep. 2022 - 08 Sep. 2022
  • 17 Mar. 2022, 15 Mar. 2022 - 19 Mar. 2022
  • 17 Mar. 2022, 15 Mar. 2022 - 19 Mar. 2022
  • Invited oral presentation, 13 Mar. 2022, 12 Mar. 2022 - 13 Mar. 2022
  • 16 Sep. 2021, 14 Sep. 2021 - 17 Sep. 2021
  • 14 Mar. 2021, 12 Mar. 2021 - 15 Mar. 2021
  • 16 Sep. 2020, 14 Sep. 2020 - 17 Sep. 2020
  • 18 Mar. 2020
  • 17 Mar. 2020
  • 17 Mar. 2020
  • 19 Sep. 2019
  • 19 Sep. 2019
  • 11 Jul. 2019, False
  • Tomohiko TAKAHASHI, International Conference on String Field Theory and String Perturbation Theory (SFT2019), Closed string symmetries in open string field theory: tachyon vacuum as sine-square deformation, 09 May 2019, True
  • 17 Mar. 2019, False
  • 16 Sep. 2018
  • 15 Sep. 2018
  • 25 Mar. 2018
  • 25 Mar. 2018
  • 14 Sep. 2017
  • SFT@HIT, Vector profile of classical solutions for constant magnetic field background, 25 Jun. 2017, True
  • 2016
  • 2016
  • String Field Theory and Related Aspects (SFT2016), Classical solutions for gauge field condensation, 2016, True
  • 2016
  • 2016
  • 2016
  • String Field Theory and Related Aspects (SFT2015), Multibrane Solutions and Chan-Paton Factors, 11 Mar. 2015, True
  • 2015
  • String Field Theory and Related Aspects (SFT2014), Observables for identity-based tachyon vacuum solutions, 01 Aug. 2014, True
  • 2014
  • 2014
  • 2013
  • 2013
  • 2013
  • 25 Mar. 2012
  • 2012
  • String Field Theory and Related Aspects (SFT2012), Tachyon Vacuum in Marginally Deformed Backgrounds, 2012, True
  • String Field Theory and Related Aspects 2011, Homotopy Operators and One-Loop Vacuum Energy at the Tachyon vacuum, 20 Sep. 2011, True
  • 26 Mar. 2011
  • 26 Mar. 2011
  • 2011
  • 20 Oct. 2010
  • 11 Sep. 2010
  • 21 Mar. 2010
  • 11 Sep. 2009
  • 13 Apr. 2009, True

Awards

  • Jul. 2015
  • 2007, Japan

Research Projects

  • 基盤研究(C), 01 Apr. 2023 - 31 Mar. 2026, 23K03388, 開弦の場の理論による閉弦理論の定式化, 高橋 智彦, 日本学術振興会, 科学研究費助成事業, 奈良女子大学, 4810000, 3700000, 1110000, kaken
    対象リソースIRI
  • Grant-in-Aid for Scientific Research (C), 01 Apr. 2020 - 31 Mar. 2023, 20K03972, The dynamics of closed strings approaching from open string field theories, 高橋 智彦; 岸本 功; 関 穣慶, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4290000, 3300000, 990000, 弦理論における２点振幅は、頂点演算子の位置を固定するという通常のゲージ固定処方では計算できなかったが、別種のゲージ固定によって評価できることが近年示された。我々は、この計算手法を演算子形式から考察することによって、mostly BRST exact 演算子を構成し、この演算子を挿入することによって開弦２点振幅を正しく計算できることを明らかにしていた。
    この mostly BRST exact 演算子に関わる研究を行い、新しい結果を得た。まず、mostly BRST exact 演算子を挿入することによって、開弦３点振幅が正しく計算できることを示した。また、この演算子を２つ挿入した相関関数から、開弦２点振幅が得られることも示した。これらの結果は、この演算子がゲージ固定を課す演算子として正しく機能することを意味している。
    さらに、この演算子を挿入した５点関数から、開弦４点振幅(Veneziano振幅）を導出することに成功した。５点関数のモジュライ空間は複素１次元空間であり、基本となる五角形が張り合わされた複雑な構造をもっている。モジュライ空間の積分において、物理的に寄与する特異性を抜き出すことにより、実１次元積分のみをもつVeneziano振幅となることを明らかにした。この際、BRST不変性と時空がミンコフスキー空間であることが重要なはたらきをすることがわかった。また、これまでの結果に基づいて、mostly BRST exact 演算子を挿入した一般のN点振幅の表式を予想した。
    mostly BRST exact 演算子に関するこれらの結果は、閉弦のみを含む振幅にも応用できる結果であり、開弦の場の理論における閉弦の記述法とも関連していると考えている。, kaken
    対象リソースIRI
  • Apr. 2015 - Mar. 2019, Principal investigator, 弦の場の理論における時空構造の研究, 高橋 智彦, 科学研究費補助金・基盤(C), 0, 0, 0, Competitive research funding
  • Apr. 2012 - Mar. 2015, Principal investigator, 弦の場の理論による非摂動的弦理論の研究, 高橋 智彦, 科学研究費補助金・基盤(B), 0, 0, 0, Competitive research funding
  • Apr. 2009 - Mar. 2012, Principal investigator, 弦の場の理論から展開する新たな弦理論像, 高橋 智彦, 科学研究費補助金・基盤(C), 0, 0, 0, Competitive research funding
  • Apr. 2006 - Mar. 2009, Principal investigator, 弦の場の理論から探る弦理論の幾何構造, 高橋 智彦, 科学研究費補助金・若手研究(B), 0, 0, 0, Competitive research funding

■Ⅲ．社会連携活動実績

１．公的団体の委員等（審議会、国家試験委員、他大学評価委員，科研費審査委員等）

  • 素粒子論グループ, 素粒子論委員, Apr. 2020 - Mar. 2022, Others
  • 日本学術振興会, 特別研究員等審査会専門員及び国際事業委員会書面審査員・ 書面評価員, Aug. 2016 - Jul. 2017, Society
  • 日本学術振興会, 特別研究員等審査会専門員及び国際事業委員会書面審査員・ 書面評価員, Aug. 2013 - Jul. 2015, Society
  • 京都大学基礎物理学研究所, 共同利用運営委員, Jan. 2013 - Dec. 2014, Others
  • 奈良北高校, SSH運営指導委員, 01 Apr. 2023 - 31 Mar. 2023
  • 日本学術振興会, 特別研究員等審査会専門委員、卓越研究員候補者選考委員会書面審査員及び国際交流事業委員会書面審査員・書面評価員, 01 Jul. 2021 - 30 Jun. 2022