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Extreme matter studies based on neutron star phenomeologies

Research Project

Project/Area Number 18H01211
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionThe University of Tokyo

Principal Investigator

FUKUSHIMA KENJI  東京大学, 大学院理学系研究科(理学部), 教授 (60456754)

Co-Investigator(Kenkyū-buntansha) 日高 義将  大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (00425604)
飯田 圭  高知大学, 教育研究部自然科学系理工学部門, 教授 (90432814)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2019: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2018: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Keywords中性子星 / 状態方程式 / 機械学習 / 量子色力学 / クォーク物質 / 相対論的重イオン衝突 / ハドロン共鳴ガス / 高密度物質 / 回帰分析 / 摂動的QCD計算 / ハドロン共鳴 / 核物質 / クォーク・ハドロン連続性 / 渦糸 / 非アーベル的渦糸 / 強磁場物性
Outline of Final Research Achievements

The objective of the project is to quantify the properties of extreme dense matter realized in deep cores of the neutron stars. In particular we focused on a relation between the (energy/rest-mass) density and the pressure, called the equation of state (EOS), and adopted the following three approaches: (1) Reconstruction of the EOS from probabilistic process of observational data. (2) Improvements of theoretical uncertainties based on the first-principles microscopic calculations. (3) Proposal of novel model descriptions with least number of fitting parameters.
In this project we have achieved the following: (1) Development of new approach using the machine learning inference. (2) Reduction of uncertainty by resummation method including the self-energy insertions. (3) Extension of the hadron resonance gas model toward high baryon density regions.

Academic Significance and Societal Importance of the Research Achievements

中性子星は宇宙最大の高密度物質を実現しており、超高強度の磁場を有するユニークな環境になっている。そのような特殊な物質の性質は、物理学の特殊な問題設定ではなく、広く一般の興味を喚起する対象である。中性子星研究は今日の物性理論における場の量子論の応用の先鞭をつけた課題でもあり、学際的にも大きな意義を持っている。とりわけ近年の重力波観測によって連星系の精密なデータが得られるようになってきており、将来的にマルチメッセンジャー天文学が発展するうえで、中性子星物質研究は喫緊の重要テーマとなっている。本研究で得られた成果は、今後長期的に継続するインパクトを持っており、さらなる発展性の期待できるものである。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (23 results)

All 2021 2020 2019 2018

All Journal Article (14 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 14 results,  Open Access: 7 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results)

  • [Journal Article] Extensive studies of the neutron star equation of state from the deep learning inference with the observational data augmentation2021

    • Author(s)
      Fujimoto Yuki、Fukushima Kenji、Murase Koichi
    • Journal Title

      Journal of High Energy Physics

      Volume: 2021 Issue: 3 Pages: 273-273

    • DOI

      10.1007/jhep03(2021)273

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Deconfining phase boundary of rapidly rotating hot and dense matter and analysis of moment of inertia2021

    • Author(s)
      Fujimoto Yuki、Fukushima Kenji、Hidaka Yoshimasa
    • Journal Title

      Physics Letters B

      Volume: 816 Pages: 136184-136184

    • DOI

      10.1016/j.physletb.2021.136184

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hard-core deconfinement and soft-surface delocalization from nuclear to quark matter2020

    • Author(s)
      Fukushima Kenji、Kojo Toru、Weise Wolfram
    • Journal Title

      Physical Review D

      Volume: 102 Issue: 9 Pages: 096017-096017

    • DOI

      10.1103/physrevd.102.096017

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mapping neutron star data to the equation of state using the deep neural network2020

    • Author(s)
      Fujimoto Yuki、Fukushima Kenji、Murase Koichi
    • Journal Title

      Physical Review D

      Volume: 101 Issue: 5 Pages: 054016-054016

    • DOI

      10.1103/physrevd.101.054016

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Resummation for the field-theoretical derivation of the negative magnetoresistance2020

    • Author(s)
      Fukushima Kenji、Hidaka Yoshimasa
    • Journal Title

      Journal of High Energy Physics

      Volume: 04 Issue: 4 Pages: 162-162

    • DOI

      10.1007/jhep04(2020)162

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lefschetz-thimble inspired analysis of the Dykhne?Davis?Pechukas method and an application for the Schwinger Mechanism2020

    • Author(s)
      Fukushima Kenji、Shimazaki Takuya
    • Journal Title

      Annals of Physics

      Volume: 415 Pages: 168111-168111

    • DOI

      10.1016/j.aop.2020.168111

    • NAID

      130008156638

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Continuity from neutron matter to two-flavor quark matter with S01 and P23 superfluidity2020

    • Author(s)
      Fujimoto Yuki、Fukushima Kenji、Weise Wolfram
    • Journal Title

      Physical Review D

      Volume: 101 Issue: 9 Pages: 094009-094009

    • DOI

      10.1103/physrevd.101.094009

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Anomalous Casimir effect in axion electrodynamics2019

    • Author(s)
      Fukushima Kenji、Imaki Shota、Qiu Zebin
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 4 Pages: 045013-045013

    • DOI

      10.1103/physrevd.100.045013

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Continuity of vortices from the hadronic to the color-flavor locked phase in dense matter2019

    • Author(s)
      Alford Mark G.、Baym Gordon、Fukushima Kenji、Hatsuda Tetsuo、Tachibana Motoi
    • Journal Title

      Physical Review D

      Volume: 99 Issue: 3 Pages: 036004-036004

    • DOI

      10.1103/physrevd.99.036004

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Constraining unintegrated gluon distributions from inclusive photon production in proton-proton collisions at the LHC2019

    • Author(s)
      Sanjin Benic, Kenji Fukushima, Oscar Garcia Montero, Raju Venugopalan
    • Journal Title

      Physics Letters B

      Volume: 791 Pages: 11-16

    • DOI

      10.1016/j.physletb.2019.02.007

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Eddy magnetization from the chiral Barnett effect2019

    • Author(s)
      Fukushima Kenji、Pu Shi、Qiu Zebin
    • Journal Title

      Physical Review A

      Volume: 99 Issue: 3 Pages: 032105-032105

    • DOI

      10.1103/physreva.99.032105

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Extreme matter in electromagnetic fields and rotation2019

    • Author(s)
      Fukushima Kenji
    • Journal Title

      Progress in Particle and Nuclear Physics

      Volume: 107 Pages: 167-199

    • DOI

      10.1016/j.ppnp.2019.04.001

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anomaly inflow on QCD axial domain-walls and vortices2018

    • Author(s)
      Fukushima Kenji、Imaki Shota
    • Journal Title

      Physical Review D

      Volume: 97 Issue: 11 Pages: 114003-114003

    • DOI

      10.1103/physrevd.97.114003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Axial Ward Identity and the Schwinger Mechanism: Applications to the Real-Time Chiral Magnetic Effect and Condensates2018

    • Author(s)
      Copinger Patrick、Fukushima Kenji、Pu Shi
    • Journal Title

      Physical Review Letters

      Volume: 121 Issue: 26 Pages: 261602-261602

    • DOI

      10.1103/physrevlett.121.261602

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Chiral and Vortical Matter in the Relativistic Heavy-Ion Collision2020

    • Author(s)
      Kenji Fukushima
    • Organizer
      日本物理学会 JPS Nuclear Physics and Physical Review C
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Rotating Relativistic Matter and Angular Momenta2020

    • Author(s)
      Kenji Fukushima
    • Organizer
      XXXII International Workshop on High Energy Physics "Hot problems of Strong Interactions"
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetic Field and Thermal QCD2020

    • Author(s)
      Kenji Fukushima
    • Organizer
      Polarisation measurements in ee, ep, pp and heavy-ion collisions
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Quark Matter under Rotation2019

    • Author(s)
      Kenji Fukushima
    • Organizer
      Theory of Hadronic Matter under Extreme Conditions
    • Related Report
      2019 Annual Research Report
  • [Presentation] Continuity from nuclear matter to two-flavor quark matter with 1S0 and 3P2 superfluid2019

    • Author(s)
      Kenji Fukushima
    • Organizer
      Quo vadis QCD theory: heavy-ion collision perspectives and beyond
    • Related Report
      2019 Annual Research Report
  • [Presentation] Hadronic EoS at Finite Baryon Density2019

    • Author(s)
      Kenji Fukushima
    • Organizer
      Workshop on the QCD Phase Structure at High Baryon Density Region
    • Related Report
      2019 Annual Research Report
  • [Presentation] New View of Melting Nuclear Matter into Quark Matter2018

    • Author(s)
      Kenji Fukushima
    • Organizer
      XIII Quark Confinement and the Hadron Spectrum
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Chiral Physics with Optical Chirality2018

    • Author(s)
      Kenji Fukushima
    • Organizer
      Quantum Anomalies and Chiral Magnetic Phenomena
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Schwinger Formula and the Axial Ward Identity2018

    • Author(s)
      Kenji Fukushima
    • Organizer
      Quantum Chromodynamics and Its Symmetries
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2018-04-23   Modified: 2023-01-30  

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