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2021 Fiscal Year Annual Research Report

Aspects of gravity and quantum theory in the stochastic formalism

Research Project

Project/Area Number 19K14707
Research InstitutionNagoya University

Principal Investigator

多田 祐一郎  名古屋大学, 高等研究院(理), 特任助教 (90837022)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsストカスティック形式 / 原始ブラックホール / 重力波
Outline of Annual Research Achievements

最終年度は4本の論文を発表した。特に "Statistics of coarse-grained cosmological fields in stochastic inflation" (JCAP 02, no.02, 021 (2022)) ではストカスティック形式において任意スケールで粗視化した曲率ゆらぎ、密度ゆらぎ、および圧縮関数の確率密度関数を計算する手法を定式化した。これによりインフレーション模型から原始ブラックホール量等の観測量をストカスティック形式でつなぐ最後のピースが完成したと言える。これらの研究成果について昨年度中5件の国際会議と3件の国内会議、4件のセミナーにおいて発表を行った。うち「名古屋大学・名古屋市科学館 公開オンラインセミナー」および「名大発アカデミックフラッシュ 第2報」の2件においてはアウトリーチ活動として一般講演を行なった。

  • Research Products

    (18 results)

All 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results) Remarks (2 results)

  • [Int'l Joint Research] Institut d’Astrophysique de Paris/Laboratoire Astroparticule et Cosmologie(フランス)

    • Country Name
      FRANCE
    • Counterpart Institution
      Institut d’Astrophysique de Paris/Laboratoire Astroparticule et Cosmologie
  • [Int'l Joint Research] Universite Libre de Bruxelles(ベルギー)

    • Country Name
      BELGIUM
    • Counterpart Institution
      Universite Libre de Bruxelles
  • [Journal Article] Statistics of coarse-grained cosmological fields in stochastic inflation2022

    • Author(s)
      Tada Yuichiro、Vennin Vincent
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2022 Pages: 021~021

    • DOI

      10.1088/1475-7516/2022/02/021

  • [Journal Article] A manifestly covariant theory of multifield stochastic inflation in phase space: solving the discretisation ambiguity in stochastic inflation2021

    • Author(s)
      Pinol Lucas、Renaux-Petel S?bastien、Tada Yuichiro
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 048~048

    • DOI

      10.1088/1475-7516/2021/04/048

  • [Journal Article] Induced gravitational waves as a cosmological probe of the sound speed during the QCD phase transition2021

    • Author(s)
      Abe Katsuya T.、Tada Yuichiro、Ueda Ikumi
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 048~048

    • DOI

      10.1088/1475-7516/2021/06/048

  • [Journal Article] Revisiting non-Gaussianity in non-attractor inflation models in the light of the cosmological soft theorem2021

    • Author(s)
      Suyama Teruaki、Tada Yuichiro、Yamaguchi Masahide
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Pages: 073E02

    • DOI

      10.1093/ptep/ptab063

  • [Journal Article] Minimal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>k</mml:mi></mml:math>-inflation in light of the conformal metric-affine geometry2021

    • Author(s)
      Mikura Yusuke、Tada Yuichiro、Yokoyama Shuichiro
    • Journal Title

      Physical Review D

      Volume: 103 Pages: L101303

    • DOI

      10.1103/PhysRevD.103.L101303

    • Open Access
  • [Journal Article] Primordial black holes in peak theory with a non-Gaussian tail2021

    • Author(s)
      Kitajima Naoya、Tada Yuichiro、Yokoyama Shuichiro、Yoo Chul-Moon
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 053~053

    • DOI

      10.1088/1475-7516/2021/10/053

  • [Presentation] 原始ブラックホールのピーク理論と非ガウス尾2022

    • Author(s)
      多田祐一郎
    • Organizer
      日本物理学会第77回年次大会
  • [Presentation] Primordial black holes in peak theory with a non-Gaussian tail2021

    • Author(s)
      Yuichiro Tada
    • Organizer
      2021 NRF-JSPS Workshop in particle physics, cosmology, and gravitation
    • Int'l Joint Research / Invited
  • [Presentation] Probability density functions of coarse-grained curvature and density perturbations in stochastic inflation2021

    • Author(s)
      Yuichiro Tada
    • Organizer
      COSMO'21
    • Int'l Joint Research
  • [Presentation] Primordial black holes in peak theory with a non-Gaussian tail2021

    • Author(s)
      Yuichiro Tada
    • Organizer
      The KEK-PH + KEK-Cosmo joint workshop on "Primordial Black Holes"
    • Int'l Joint Research
  • [Presentation] Probability density functions of coarse-grained curvature and density perturbations in stochastic inflation2021

    • Author(s)
      Yuichiro Tada
    • Organizer
      JGRG30
    • Int'l Joint Research
  • [Presentation] Primordial black holes and induced gravitational waves in light of the non-Gaussian tail2021

    • Author(s)
      Yuichiro Tada
    • Organizer
      FY2021 学術変革領域研究「ダークマター」シンポジウム
    • Int'l Joint Research / Invited
  • [Presentation] 粗視化曲率ゆらぎの確率密度関数2021

    • Author(s)
      多田祐一郎
    • Organizer
      日本物理学会秋季大会
  • [Presentation] インフレーションの「現在」と重力波2021

    • Author(s)
      多田祐一郎
    • Organizer
      DECIGO workshop
    • Invited
  • [Remarks]

    • URL

      https://profs.provost.nagoya-u.ac.jp/html/100011770_ja.html?k=%E5%A4%9A%E7%94%B0%E7%A5%90%E4%B8%80%E9%83%8E

  • [Remarks]

    • URL

      https://nekomammat.github.io/indexJP.html

URL: 

Published: 2022-12-28  

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