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2011 Fiscal Year Annual Research Report

宇宙論的非線形・非摂動重力現象の研究

Research Project

Project/Area Number 21244033
Research InstitutionKyoto University

Principal Investigator

佐々木 節  京都大学, 基礎物理学研究所, 教授 (70162386)

Co-Investigator(Kenkyū-buntansha) 田中 貴浩  京都大学, 基礎物理学研究所, 教授 (40281117)
Keywordsインフレーション宇宙 / 曲率揺らぎ / 宇宙の非ガウス揺らぎ / 修正重力理論 / ブラックホール / 重力波 / 暗黒エネルギー
Research Abstract

最近、様々な修正重力理論における時空計量の共形変換による観測量への影響が議論されている。そこで佐々木は、共形変換に対する曲率揺らぎの振舞いを明らかにし、観測量が共形不変であることを示した。また、ハイブリッド・インフレーションにおいて相転移を担う場による曲率揺らぎを解析し、モデルパラメーターに観測的に強い制限が課されることを示した。さらに、インフレーション中に粒子生成が起こる場合の揺らぎの非ガウス性を調べ、その波数依存性に特徴的な振動を見出した。田中は、高階微分曲率項+スカラー場理論に注目し、連星系からの重力波観測におけるエネルギー散逸の影響を見積もり、将来のスペース干渉計を使うと、理論に強い制限がつけ得ることを明らかにした。
連携研究者も多くの業績をあげた。辻川は、一般的なスカラーテンソル(ST)理論に基づくインフレーションでの揺らぎの非ガウス性と、暗黒エネルギー模型としての有効性条件を明らかにした。向山は、HL理論の低エネルギーで一般相対性理論への極限が連続的であることを示した。山本は、修正重力理論の予言と宇宙論的観測を用いたテストの研究を進めた。白水は、任意の高次元時空の光的遠方での対称性がポアンカレ群になることを示した。早田は、パリティーを破る重力波の非ガウス性がスローロールのオーダーで存在することを明らかにした。山口は、一般的なST理論におけるインフレーションからの揺らぎのスペクトル及び非ガウス性の公式を導いた。松原は、重力的非線形成長の摂動論を展開し、具体的に2ループ補正まで計算し観測量の予言を行った。千葉は、遠方の星の観測における二体ブラックホールの衝突に伴う影に複雑な構造を見出した。石原は、閉じた余剰次元をもつ高次元ブラックホールの厳密解の幾何学構造を解析した。高橋は、一般ポテンシャルを持つカーバトン模型におけるスペクトル指数や非ガウス性の解析的表式を導いた。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

インフレーション宇宙からの非線形・非ガウス揺らぎに関する研究も、修正重力理論に関する研究に関しても、国際的に注目される成果が順調に得られている。

Strategy for Future Research Activity

これまで通りに、ひとつひとつ確実に基礎を積み重ねていくと同時に、来年早々のPlanck衛星のデータ解析結果の発表など、観測の動向にこれまで以上に目を配りつつ、研究を推進する。

  • Research Products

    (55 results)

All 2012 2011 Other

All Journal Article (29 results) (of which Peer Reviewed: 29 results) Presentation (24 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Tunneling without barriers with gravity2012

    • Author(s)
      Sugumi Kanno
    • Journal Title

      Classical and Quantum Gravity

      Volume: 29

    • DOI

      10.1088/0264-9381/29/7/075010

    • Peer Reviewed
  • [Journal Article] Multi-field open inflation model and multi-field dynamics in tunneling2012

    • Author(s)
      Kazuyuki Sugimura
    • Journal Title

      JCAP

      Volume: 1201

    • DOI

      10.1088/1475-7516/2012/01/027

    • Peer Reviewed
  • [Journal Article] Screening of cosmological constant in non-local cosmology2012

    • Author(s)
      Ying-li Zhang
    • Journal Title

      International Journal of Modem Physics D

      Volume: 21

    • DOI

      10.1142/S021827181250006X

    • Peer Reviewed
  • [Journal Article] Holographic Dual of de Sitter Universe with AdS Bubbles2012

    • Author(s)
      Sugumi Kanno
    • Journal Title

      Nuclear Physics B

      Volume: 855 Pages: 361-387

    • DOI

      10.1016/j.nuclphysb.2011.10.020

    • Peer Reviewed
  • [Journal Article] Spatial averaging and apparent acceleration in inhomogeneous spaces2012

    • Author(s)
      Antonio Enea Romano
    • Journal Title

      General Relativity and Gravitation

      Volume: 44 Pages: 353-365

    • DOI

      10.1007/s10714-011-1277-4

    • Peer Reviewed
  • [Journal Article] Cosmology with space-based gravitational-wave detectors--dark energy and primordial gravitational waves--2012

    • Author(s)
      Atsushi Nishizawa
    • Journal Title

      Physical Review D

      Volume: 85

    • DOI

      10.1103/PhysRevD.85.044047

    • Peer Reviewed
  • [Journal Article] Extremal Charged Black Holes with a Twisted Extra Dimension2012

    • Author(s)
      Takamitsu Tatsuoka
    • Journal Title

      Physical Review D

      Volume: 85

    • DOI

      10.1103/PhysRevD.85.044006

    • Peer Reviewed
  • [Journal Article] General relativity limit of Horava-Lifshitz gravity with a scalar field in gradient expansion2012

    • Author(s)
      A.Emir Gumrukcuoglu
    • Journal Title

      Physical Review D

      Volume: 85

    • DOI

      10.1103/PhysRevD.85.064042

    • Peer Reviewed
  • [Journal Article] Conformal invariance of curvature perturbation2011

    • Author(s)
      Jinn-Ouk Gong
    • Journal Title

      JCAP

      Volume: 1109

    • DOI

      10.1088/1475-7516/2011/09/023

    • Peer Reviewed
  • [Journal Article] Curvature perturbation and waterfall dynamics in hybrid inflation2011

    • Author(s)
      Ali Akbar Abolhasani
    • Journal Title

      JCAP

      Volume: 1110

    • DOI

      10.1088/1475-7516/2011/10/015

    • Peer Reviewed
  • [Journal Article] Large and strong scale dependent bispectrum in single field inflation from a sharp feature in the mass2011

    • Author(s)
      Frederico Arroja
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.123503

    • Peer Reviewed
  • [Journal Article] Open inflation in the landscape2011

    • Author(s)
      Daisuke Yamauchi
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.043513

    • Peer Reviewed
  • [Journal Article] Gregory-Laflamme instability of a slowly rotating black string2011

    • Author(s)
      Chul-Moon Yoo
    • Journal Title

      International Journal of Modern Physics D

      Volume: 20 Pages: 963-988

    • DOI

      10.1142/S0218271811019359

    • Peer Reviewed
  • [Journal Article] Cosmic censorship in overcharging a Reissner-Nordstrom black hole via charged particle absorption2011

    • Author(s)
      Soichiro Isoyama
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.124024

    • Peer Reviewed
  • [Journal Article] Chiral Phase Transitions around Black Holes2011

    • Author(s)
      Antonino Flachi
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.061503

    • Peer Reviewed
  • [Journal Article] Black holes in braneworld models2011

    • Author(s)
      Norihiro Tanahashi
    • Journal Title

      Progress of Theoretical Physics Supplements

      Volume: 189 Pages: 227-268

    • DOI

      10.1143/PTPS.189.227

    • Peer Reviewed
  • [Journal Article] Dominance of gauge artifact in the consistency relation for the primordial bispectrum2011

    • Author(s)
      Takahiro Tanaka
    • Journal Title

      JCAP

      Volume: 1105

    • DOI

      10.1088/1475-7516/2011/05/014

    • Peer Reviewed
  • [Journal Article] A note on the role of the boundary terms for the non-Gaussianity in general k-inflation2011

    • Author(s)
      Frederico Arroja
    • Journal Title

      JCAP

      Volume: 1105

    • DOI

      10.1088/1475-7516/2011/05/005

    • Peer Reviewed
  • [Journal Article] Stability of Schwarzschild-like solutions in f(R,G) gravity models2011

    • Author(s)
      Antonio De Felice
    • Journal Title

      Physical Review D

      Volume: 83

    • DOI

      10.1103/PhysRevD.83.104035

    • Peer Reviewed
  • [Journal Article] Probing the size of extra dimension with gravitational wave astronomy2011

    • Author(s)
      Kent Yagi
    • Journal Title

      Physical Review D

      Volume: 83

    • DOI

      10.1103/PhysRevD.83.084036

    • Peer Reviewed
  • [Journal Article] Natural selection of inflationary vacuum required by infra-red regularity and gauge-invariance2011

    • Author(s)
      Yuko Urakawa
    • Journal Title

      Progress of Theoretical Physics

      Volume: 125 Pages: 1067-1089

    • DOI

      10.1143/PTP.125.1067

    • Peer Reviewed
  • [Journal Article] Inflationary non-Gaussianities in the most general second-order scalar-tensor theories2011

    • Author(s)
      Antonio De Felice
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.083504

    • Peer Reviewed
  • [Journal Article] Large Scale Structures in Kinetic Gravity Braiding Model That Can Be Unbraided2011

    • Author(s)
      Rampei Kimura
    • Journal Title

      JCAP

      Volume: 1104

    • DOI

      10.1088/1475-7516/2011/04/025

    • Peer Reviewed
  • [Journal Article] Asymptotic flatness at null infinity in arbitrary dimensions2011

    • Author(s)
      Kentaro Tanabe
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.044055

    • Peer Reviewed
  • [Journal Article] Parity Violation in Graviton Non-gaussianity2011

    • Author(s)
      Jiro Soda
    • Journal Title

      JHEP

      Volume: 1108

    • DOI

      10.1007/JHEP08(2011)067

    • Peer Reviewed
  • [Journal Article] Generalized G-inflation : Inflation with the most general second-order field equations2011

    • Author(s)
      Tsutomu Kobayashi
    • Journal Title

      Progress of Theoretical Physics

      Volume: 126 Pages: 511-529

    • DOI

      10.1143/PTP.126.511

    • Peer Reviewed
  • [Journal Article] Nonlinear Perturbation Theory Integrated with Nonlocal Bias, Redshift-space Distortions, and Primordial Non-Gaussianity2011

    • Author(s)
      Takahiko Matsubara
    • Journal Title

      Physical Review D

      Volume: 83

    • DOI

      10.1103/PhysRevD.83.083518

    • Peer Reviewed
  • [Journal Article] Shadows of Colliding Black Holes2011

    • Author(s)
      Daisuke Nitta
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysRevD.84.063008

    • Peer Reviewed
  • [Journal Article] Non-Gaussianity from Curvatons Revisited2011

    • Author(s)
      Masahiro Kawasaki
    • Journal Title

      Physical Review D

      Volume: 84

    • DOI

      10.1103/PhysKevD.84.123506

    • Peer Reviewed
  • [Presentation] 物理定数はどこまで定数か?2012

    • Author(s)
      千葉剛
    • Organizer
      日本物理学会第67回年会
    • Place of Presentation
      関西学院大学(招待講演)
    • Year and Date
      2012-03-24
  • [Presentation] Testing the string theory landscape in cosmology2012

    • Author(s)
      佐々木節
    • Organizer
      第5回「超弦理論と宇宙」研究会
    • Place of Presentation
      ホテル望海(別府)(招待講演)
    • Year and Date
      2012-02-21
  • [Presentation] Accelerating expansion of the universe and testing gravity on cosmological scales2012

    • Author(s)
      山本一博
    • Organizer
      4th GCOE International Symposium : Weaving Science Web beyond Particle-Matter Hierarch
    • Place of Presentation
      東北大学(招待講演)
    • Year and Date
      2012-02-21
  • [Presentation] Cosmology Now and Tomorrow2012

    • Author(s)
      佐々木節
    • Organizer
      2012 KASI-YITP Joint-Workshop : Cosmology Now and Tomorrow
    • Place of Presentation
      デジョン(韓国)(招待講演)
    • Year and Date
      2012-02-17
  • [Presentation] 相対性理論、次元、そして特異点2011

    • Author(s)
      白水徹也
    • Organizer
      研究会「数理連携10の根本問題の発掘」
    • Place of Presentation
      理化学研究所(招待講演)
    • Year and Date
      2011-12-27
  • [Presentation] Open inflation in the string landscape2011

    • Author(s)
      佐々木節
    • Organizer
      Xth International Conference on Gravitation, Astrophysics and Cosmology
    • Place of Presentation
      クイノン(ベトナム)(招待講演)
    • Year and Date
      2011-12-17
  • [Presentation] Hawking radiation of interacting fields2011

    • Author(s)
      田中貴浩
    • Organizer
      Black holes : New Horizons
    • Place of Presentation
      パンフ(カナダ)(招待講演)
    • Year and Date
      2011-11-22
  • [Presentation] 相対論からの話題2011

    • Author(s)
      石原秀樹
    • Organizer
      第24回理論懇シンポジウム「理論天文学・宇宙物理学の革新」
    • Place of Presentation
      国立天文台(招待講演)
    • Year and Date
      2011-11-07
  • [Presentation] Integration of nonlocal bias, redshift-space distortions, primordial non-Gaussianity with the nonlinear perturbation theory2011

    • Author(s)
      松原隆彦
    • Organizer
      DENET/IAP Conference : The Accelerating Universe
    • Place of Presentation
      パリ(フランス)(招待講演)
    • Year and Date
      2011-10-26
  • [Presentation] Anisotropic Inflation and Statistical Symmetry Breaking in the CMB2011

    • Author(s)
      早田次郎
    • Organizer
      Pre-Planckian Inflation
    • Place of Presentation
      ミネソタ大学(米国)(招待講演)
    • Year and Date
      2011-10-08
  • [Presentation] Constraints on modified gravity models from future gravitational wave observations2011

    • Author(s)
      田中貴浩
    • Organizer
      KIAS-YITP Joint workshop : String Theory, Holography and Beyond
    • Place of Presentation
      ソウル(韓国)(招待講演)
    • Year and Date
      2011-09-23
  • [Presentation] 重力波物理の進展2011

    • Author(s)
      田中貴浩
    • Organizer
      日本物理学会
    • Place of Presentation
      弘前大学(招待講演)
    • Year and Date
      2011-09-17
  • [Presentation] インフレーションの再加熱過程における非熱的グラビティーノ問題の発見2011

    • Author(s)
      高橋史宜
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      弘前大学
    • Year and Date
      2011-09-17
  • [Presentation] Observational status and models of dark energy2011

    • Author(s)
      辻川信二
    • Organizer
      Sixth Aegean summer school : Quantum gravity and quantum cosmology
    • Place of Presentation
      ナクソス(ギリシャ)(招待講演)
    • Year and Date
      2011-09-16
  • [Presentation] Infrared divergences and cosmological observables2011

    • Author(s)
      田中貴浩
    • Organizer
      UK Cosmo 2011
    • Place of Presentation
      ポーツマス大学(英国)(招待講演)
    • Year and Date
      2011-09-14
  • [Presentation] Bigbang, Inflation and Quantum Cosmology2011

    • Author(s)
      佐々木節
    • Organizer
      2011 APCTP International School on Numerical Relativity and Gravitational Waves
    • Place of Presentation
      ポハン(韓国)(招待講演)
    • Year and Date
      2011-07-28
  • [Presentation] Non-Gaussianity from inflation2011

    • Author(s)
      佐々木節
    • Organizer
      WKYC 2011 : Future of Large Scale Structure Formation
    • Place of Presentation
      ソウル(韓国)(招待講演)
    • Year and Date
      2011-06-27
  • [Presentation] IR issues during inflation-constraints on quantum state-2011

    • Author(s)
      田中貴浩
    • Organizer
      Cosmological Frontiers in Fundamental Physics
    • Place of Presentation
      パリ第7大学(フランス)(招待講演)
    • Year and Date
      2011-06-17
  • [Presentation] Open Inflation in the Landscape2011

    • Author(s)
      佐々木節
    • Organizer
      5th PI/Solvay/APC joint workshop on "Cosmological Frontiers in Fundamental Physics
    • Place of Presentation
      パリ第7大学(フランス)(招待講演)
    • Year and Date
      2011-06-14
  • [Presentation] DeltaN Formalism and Curvature Perturbations on Superhorizon Scales2011

    • Author(s)
      佐々木節
    • Organizer
      Cosmology Since Einstein
    • Place of Presentation
      香港工科大学(中国)(招待講演)
    • Year and Date
      2011-05-30
  • [Presentation] IR issues during inflation-constraints on quantum state-2011

    • Author(s)
      田中貴浩
    • Organizer
      Cosmological Non-Gaussianity : Observations Confront Theory Workshop
    • Place of Presentation
      ミシガン大学(米国)(招待講演)
    • Year and Date
      2011-05-15
  • [Presentation] Delta N Formalism and Superhorizon Curvature Perturbation2011

    • Author(s)
      佐々木節
    • Organizer
      Cosmological Non-Gaussianity : Observations Confront Theory Workshop
    • Place of Presentation
      ミシガン大学(米国)(招待講演)
    • Year and Date
      2011-05-13
  • [Presentation] From Black Holes to Hydrodynamics2011

    • Author(s)
      向山信治
    • Organizer
      From Black Holes to Hydrodynamics
    • Place of Presentation
      ビクトリア大学(カナダ)(招待講演)
    • Year and Date
      2011-04-22
  • [Presentation] Tensor perturbation constraint on inflation models with non-negligible spatial curvature in landscape scenario2011

    • Author(s)
      田中貴浩
    • Organizer
      Bubbles in the Sky
    • Place of Presentation
      UCデイビス(米国)(招待講演)
    • Year and Date
      2011-04-01
  • [Book] 宇宙に外側はあるか2012

    • Author(s)
      松原隆彦
    • Total Pages
      258
    • Publisher
      光文社
  • [Remarks]

    • URL

      http://www2.yukawa.kyoto-u.ac.jp/~misao/KibanA/index.html

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Published: 2013-06-26  

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