• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Time dependence of dark energy and microscopic theory

Research Project

Project/Area Number 16K05336
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

Kitazawa Yoshihisa  大学共同利用機関法人高エネルギー加速器研究機構, その他部局等, シニアフェロー (10195258)

Project Period (FY) 2016-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsslow roll inflation / random walk / slow rolling inflation / Fokker Planck equation / entangled entropy / inflaton potentia / de Sitter entropy / conformal zeromode / Fokker-Planck equation / UV complete spacetime / inflationary spacetime / de Sitter duality / ダークエネルギーの時間依存性 / 微視的理論 / 量子重力 / コンフォーマル不変性 / 赤外発散の足しあげ / Fokker-Planck方程式 / ダークエネルギー / 時間依存性 / リュービル模型 / von Neumann エントロピー / ベータ関数 / Liouville action / 2d de Sitter space / a slow roll inflation / cosmological constant / super horizon modes / von-Neumann entropy / correlation functions / single field inflation / non-Gaussianity / IR logarithmic effects / shift symmetry breaking / a linear potential / 非平衡系における対称性の破れ / 赤外紫外混合効果 / 赤外量子効果 / 量子重力理論の微視的理解 / 結合定数の時間変化の相対速度 / 非平衡系 / 対称性の破れ
Outline of Final Research Achievements

The scale invariance of the universe is slightly broken by slow roll parameters. It is likely the inflation is dual to the random walk. We investigate the distribution function of the conformal zeromode. We identify de Sitter entropy S with the distribution entropy of the conformal zeromode ρ(ω). We have collected convincing support on our postulate. The semiclassical evidence is that the both are given by the gravitational coupling 1/g = log N/2 where g = GN H2/π and N is the e-folding number. We show the renormalized distribution function obeys gravitational Fokker-Planck equation (GFP) and Langevin equations . Under the Gaussian approximation, they boil down to a simple first order partial differential equation. The identical equation is derived by the thermodynamic arguments in the inflationary space-time. GFP deter- mines the evolution of de Sitter entropy of the universe.

Academic Significance and Societal Importance of the Research Achievements

インフレーション理論は、ブラウン運動におけるランダムウォークと双対な関係にあります。de Sitter エントロピー S は、計量の共形ゼロモード ρ(t、ω) の分布エントロピーと同定できます。 半古典的には、双方とも重力結合 分布関数は、フォッカー・プランク方程式 (GFP) とランジュバン方程式に従います。 ガウス近似では、これらは簡単な一次偏微分方程式に要約されます。 同一の方程式は、インフレーション時空における熱力学によって導出されます。inflatonと計量の共形ゼロモードを同一視することによって、ds双対性が明白となる。

Report

(8 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (17 results)

All 2022 2021 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (7 results) (of which Int'l Joint Research: 5 results,  Invited: 5 results) Funded Workshop (2 results)

  • [Int'l Joint Research] NCTS(中国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] NCTS(Taiwan)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Holographic β Function in de Sitter Space2022

    • Author(s)
      Yoshihisa Kitazawa
    • Journal Title

      J.Phys.Soc.Jap. 91 (2022) 7, 074003

      Volume: 91 Issue: 7

    • DOI

      10.7566/jpsj.91.074003

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Curvature perturbations and anomaly explain dark energy2021

    • Author(s)
      Yoshihisa Kitazawa
    • Journal Title

      Progress of Theoretical and Experimental Physics, Volume 2021, Issue 10, October 2021

      Volume: 2021, Issue 10 Issue: 10

    • DOI

      10.1093/ptep/ptab083

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] de Sitter Duality and Logarithmic Decay of Dark Energy2020

    • Author(s)
      Hiroyuki Kitamoto, Yoshihisa Kitazawa, Takahiko Matsubara
    • Journal Title

      Physical Review D

      Volume: 101 Issue: 2 Pages: 1-22

    • DOI

      10.1103/physrevd.101.023504

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Entropy generation at the horizon diffuses the cosmological constant in 2D de Sitter space2019

    • Author(s)
      Hiroyuki Kitamoto and Yoshihisa Kitazawa
    • Journal Title

      Phys. Rev. D 99, 085015

      Volume: D 99 Issue: 8

    • DOI

      10.1103/physrevd.99.085015

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Non-Gaussian and loop effects of inflationary correlation functions in BRST formalism2017

    • Author(s)
      Hiroyuki Kitamoto , Yoshihisa Kitazawa , Ryota Kojima
    • Journal Title

      Phys.Rev.D

      Volume: 96 Issue: 2 Pages: 023535-023535

    • DOI

      10.1103/physrevd.96.023535

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effective Lagrangian in de Sitter Spacetime2017

    • Author(s)
      Hiroyuki Kitamoto, Yoshihia Kitazawa
    • Journal Title

      Phys. Rev.D

      Volume: 95 Issue: 2

    • DOI

      10.1103/physrevd.95.025017

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Holographic β Function in de Sitter Space2022

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      Quantum Physics 2022 May 23-24
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Curvature perturbations and anomaly explain dark energy2021

    • Author(s)
      Yshihisa Kiazawa
    • Organizer
      日本物理学会秋の総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Curvature Perturbations and Anomaly explain Dark Energy2020

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      日本物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] de Sitter duality and logarithmic decay of dark energy2019

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      East Asian Joint Workshop on Fields and Strings
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Infra-red Effects in de Sitter Space-time2017

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      2nd East Asian Joint Workshop on Fields and Strings
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effective Lagrangian in de Sitter Spacetime2016

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      NCTS Annual Theory Meeting
    • Place of Presentation
      Hsinchu (Taiwan)
    • Year and Date
      2016-12-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effective Lagrangian in de Sitter Spacetime2016

    • Author(s)
      Yoshihisa Kitazawa
    • Organizer
      1st East Asian Joint Workshop on Fields and Strings
    • Place of Presentation
      Hefei (China)
    • Year and Date
      2016-05-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Funded Workshop] Strings 20182018

    • Related Report
      2018 Research-status Report
  • [Funded Workshop] 2nd East Asian Joint Workshop on Fields and Strings2017

    • Related Report
      2017 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi