Yamamoto, Naoki

写真a

Affiliation

Faculty of Science and Technology, Department of Physics (Yagami)

Position

Associate Professor

Related Websites

Career 【 Display / hide

  • 2007.04
    -
    2010.03

    東京大学, 大学院理学系研究科, 日本学術振興会 特別研究員 (DC1)

  • 2010.04
    -
    2012.03

    University of Washington, Institute for Nuclear Theory, JSPS Postdoctoral Fellow for Research Abroad / Research Associate

  • 2012.04
    -
    2013.08

    京都大学, 基礎物理学研究所, 日本学術振興会 特別研究員 (PD)

  • 2013.09
    -
    2014.03

    University of Maryland, Maryland Center for Fundamental Physics, Research Associate

  • 2014.04
    -
    2017.03

    慶應義塾大学, 理工学部物理学科, 専任講師

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Academic Background 【 Display / hide

  • 2001.04
    -
    2005.03

    The University of Tokyo, 理学部, Department of Physics

    University, Graduated

  • 2005.04
    -
    2007.03

    The University of Tokyo, Faculty of Science, Department of Physics

    Graduate School, Completed, Master's course

  • 2007.04
    -
    2010.03

    The University of Tokyo, Faculty of Science, Department of Physics

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 博士(理学), The University of Tokyo, Coursework, 2010.03

 

Research Areas 【 Display / hide

  • Particle/Nuclear/Cosmic ray/Astro physics

 

Papers 【 Display / hide

  • Magnetic field induced neutrino chiral transport near equilibrium

    Naoki Yamamoto, Di-Lun Yang

    Physical Review D 104 ( 12 ) 123019(1-15) 2021.12

    Research paper (scientific journal), Joint Work, Accepted

  • Chiral soliton lattice phase in warm QCD

    Tomáš Brauner, Helena Kolešová, Naoki Yamamoto

    Physics Letters B 823 ( 10 ) 136767(1-7) 2021.11

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  03702693

     View Summary

    We analyze the phase diagram of quantum chromodynamics at low-to-moderate temperature, baryon chemical potential and external magnetic field within chiral perturbation theory at next-to-leading order of the derivative expansion. Our main result is that the anomaly-induced chiral soliton lattice (CSL) phase is stabilized by thermal fluctuations. As a consequence, the CSL state may survive up to temperatures at which chiral symmetry is restored.

  • Floquet vacuum engineering: Laser-driven chiral soliton lattice in the QCD vacuum

    Akihiro Yamada, Naoki Yamamoto

    Physical Review D 104 ( 5 ) 054041(1-7) 2021.09

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  24700010

     View Summary

    What happens to the QCD vacuum when a time-periodic circularly polarized laser field with a sufficiently large intensity and frequency is applied? Based on the Floquet formalism for periodically driven systems and the systematic low-energy effective theory of QCD, we show that for a sufficiently large frequency and above a critical intensity, the QCD vacuum is unstable against the chiral soliton lattice of pions; a crystalline structure of topological solitons that spontaneously breaks parity and continuous translational symmetries. Our work would pave the way for novel “Floquet vacuum engineering.”

  • Positive magnetoresistance induced by hydrodynamic fluctuations in chiral media

    Noriyuki Sogabe, Naoki Yamamoto, Yi Yin

    Journal of High Energy Physics 09 ( 131 ) 1 - 31 2021.09

    Research paper (scientific journal), Joint Work, Accepted

     View Summary

    We analyze the combined effects of hydrodynamic fluctuations and chiral magnetic effect (CME) for a chiral medium in the presence of a background magnetic field. Based on the recently developed non-equilibrium effective field theory, we show fluctuations give rise to a CME-related positive contribution to magnetoresistance, while the early studies without accounting for the fluctuations find a CME-related negative magnetoresistance. At zero axial relaxation rate, the fluctuations contribute to the transverse conductivity in addition to the longitudinal one.

  • Topological mass generation in gapless systems

    Naoki Yamamoto, Ryo Yokokura

    Physical Review D 104   025010(1-17) 2021.07

    Research paper (scientific journal), Joint Work, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

  • カイラリティと宇宙

    山本 直希

    数理科学(特集:カイラリティとは何か) 59 ( 3 ) 45 - 51 2021.03

    Introduction and explanation (commerce magazine), Single Work

  • トポロジカル輸送現象入門

    山本 直希

    原子核研究 64   22 - 29 2020.02

    Introduction and explanation (scientific journal)

  • Chiral Transport Phenomena

    山本 直希

    原子核研究 63 ( 2 ) 72 - 73 2019.03

    Introduction and explanation (scientific journal), Single Work

  • 相対論的流体力学

    山本 直希

    数理科学(特集:相対論的思考法のすすめ) 55 ( 8 ) 36 - 42 2017.08

    Introduction and explanation (commerce magazine), Single Work

Presentations 【 Display / hide

  • Chirality: from particle physics to astrophysics

    山本 直希

    Molecular Chirality 2021 (東広島芸術文化ホール くらら) , 2021.11, Oral Presentation(guest/special)

  • トポロジカル輸送現象と素粒子物理

    山本 直希

    奥羽越素粒子論研究会 (オンライン) , 2021.11, Public discourse, seminar, tutorial, course, lecture and others

  • Chiral radiation transport theory of neutrinos

    Naoki Yamamoto, Di-Lun Yang

    Helicity and space-time symmetry ― a new perspective of classical and quantum systems (Online) , 2021.10, Oral Presentation(guest/special)

  • ヘリカル磁気効果

    山本 直希, Di-Lun Yang

    日本物理学会2021年秋季大会 (オンライン) , 2021.09, Oral Presentation(general)

  • Chiral Soliton Lattice in QCD

    Naoki Yamamoto

    Topological aspects of strong correlations and gauge theories (Online) , 2021.09, Oral Presentation(guest/special)

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • 素粒子論に基づく超新星のカイラル輻射流体力学の構築

    2019.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 山本 直希, Grant-in-Aid for Scientific Research (C), Principal Investigator

  • カイラル輸送現象による超新星爆発・初期宇宙の新物理

    2016.04
    -
    2019.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 山本 直希, Grant-in-Aid for Young Scientists (B), Principal Investigator

Works 【 Display / hide

  • 他研究所セミナー招待講演(高エネルギー加速器研究機構)

    山本 直希

    オンライン, 

    2020.07

    Other

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    Magnetic monopoles and fermion number violation in chiral matter

  • 他研究所セミナー招待講演(高エネルギー加速器研究機構)

    山本 直希

    高エネルギー加速器研究機構, 

    2019.06

    Other

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    Chiral Soliton Lattice in QCD

  • 他大学セミナー招待講演(早稲田大学 天体物理学研究室)

    早稲田大学 天体物理学研究室, 

    2018.07

    Other

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    Chirality and Astrophysics

  • 他大学セミナー招待講演(東京大学 駒場キャンパス 素粒子論研究室)

    東京大学 駒場キャンパス 素粒子論研究室, 

    2017.12

    Other

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    カイラル輸送現象:ニュートリノから超新星爆発へ

  • 他研究所セミナー招待講演(高エネルギー加速器研究機構)

    山本 直希

    高エネルギー加速器研究機構, 

    2017.12

    Other

     View Details

    Chirality, Topology, and Astrophysics

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Awards 【 Display / hide

  • 第28回 井上研究奨励賞

    2012.02, 井上科学振興財団

    Type of Award: Awards of Publisher, Newspaper Company and Foundation

  • 2009年度 東京大学 大学院理学系研究科 研究奨励賞(博士)

    2010.03, 東京大学 大学院理学系研究科

    Type of Award: Other Awards

 

Courses Taught 【 Display / hide

  • QUARK-HADRON PHYSICS

    2021

  • QUANTUM MECHANICS 3

    2021

  • NUCLEAR PHYSICS

    2021

  • LITERATURE OF PHYSICS

    2021

  • INDEPENDENT STUDY ON FUNDAMENTAL SCIENCE AND TECHNOLOGY

    2021

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Memberships in Academic Societies 【 Display / hide

  • 日本物理学会, 

    2006.09
    -
    Present