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2009 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高次元時空 / ブラックホール / 動的コンパクト化 / ブレーン宇宙 / 非ガウス揺らぎ / インフレーション宇宙 / 拡張重力理論 / 暗黒エネルギー
Research Abstract

代表者・佐々木は,高次元時空理論の動的解を求め,動的コンパクト化を与えるモデルの存在を示し,現実的な宇宙論モデル構築への第一歩を与えた。また時空曲率の任意関数で与えられる理論のハミルトン形式を定式化した。
分担者・田中は,ブレーンワールドにおけるブレーン局在ブラックホール(BH)解の存在問題に関連して,漸近AdS時空のBH解の性質を調べAdS/CFT対応が成り立つことを確認し,可能なBH解の系列を明らかにした。
連携研究者も多くの成果を上げた。高橋は等曲率揺らぎの非ガウス性についてtripspectrumを求め,ある無矛盾条件の成立を示した。早田はインフレーション中の原始磁場生成が,反作用によって妨げられることを明らかにした。向山はrapid-rollインフレーションへの観測からの制限,弦理論的curvaton模型の提唱等を行い,Horava-Lifshitz重力に基づく宇宙論を展開した。山本はf(R)重力における線形揺らぎを調べ,ある漸近領域での解析解を見つけた。千葉は一般のslow-rollモデルにおける宇宙定数を含む暗黒エネルギー(DE)の状態方程式の解析的公式を与えた。白水は原始磁場の生成と進化を定式化した。また,重力崩壊の際にベンローズ不等式が成り立つとBHの最終状態に強い制限を与えることを示した。山口はcurvatonやmodulated reheatingシナリオでは非ガウス性がグラビティーノ暗黒物質に強い制限をつけることを示した。松原は原始密度揺らぎの非ガウス性とCMBの統計的性質の関係を調べた。辻川は修正重力理論に基づくDE模型の構築を進め,その観測的・実験的兆候を調べた。
以上の成果を踏まえて,3月に海外から協力研究者を数名招へいして国際研究集会「Non-Gaussian Universe」を開き,現状の総括と今後の方針に関する議論を行った。

  • Research Products

    (51 results)

All 2010 2009 Other

All Journal Article (36 results) (of which Peer Reviewed: 36 results) Presentation (12 results) Book (2 results) Remarks (1 results)

  • [Journal Article] Hamiltonian formulation of f(Riemann) theories of gravity2010

    • Author(s)
      Nathalie Deruelle
    • Journal Title

      Progress of Theoretical Physics

      Volume: 123 Pages: 169-185

    • Peer Reviewed
  • [Journal Article] Boosted perturbations at the end of inflation2010

    • Author(s)
      Ignacio Zaballa
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 1003

    • Peer Reviewed
  • [Journal Article] Quantum Back Reaction to asymptotically AdS Black Holes2010

    • Author(s)
      Kazumi Kashiyama
    • Journal Title

      Journal of High Energy Physics

      Volume: 1001

    • Peer Reviewed
  • [Journal Article] Constraining alternative theories of gravity by gravitational waves from precessing eccentric compact binaries with LISA2010

    • Author(s)
      Kent Yagi
    • Journal Title

      Physical Review D

      Volume: 81

    • Peer Reviewed
  • [Journal Article] Characterising linear growth rate of cosmological density perturbations in f(R) model2010

    • Author(s)
      Tatsuya Narikawa
    • Journal Title

      Physical Review D

      Volume: 81

    • Peer Reviewed
  • [Journal Article] The Equation of State of Tracker Fields2010

    • Author(s)
      Takeshi Chiba
    • Journal Title

      Physical Review D

      Volume: 81

    • Peer Reviewed
  • [Journal Article] Static black hole uniqueness and Penrose inequality2010

    • Author(s)
      Ryosuke Mizuno
    • Journal Title

      Physical Review D

      Volume: 81

    • Peer Reviewed
  • [Journal Article] Analytic Miknowski Functionals of the Cosmic Microwave Background : Second-order Non-Gaussianity with Bispectrum and Trispectrum2010

    • Author(s)
      Takahiko Matsubara
    • Journal Title

      Physical Review D

      Volume: 81

    • Peer Reviewed
  • [Journal Article] Spin polarization effects in micro black hole evaporation2009

    • Author(s)
      Antonino Flachi
    • Journal Title

      Journal of High Energy Physics

      Volume: 0905

    • Peer Reviewed
  • [Journal Article] Dynamical Compactification and Inflation in Einstein-Yang-Mills Theory with Higher Derivative Coupling2009

    • Author(s)
      Hironobu Kihara
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Dynamical D4-D8 and D3-D7 branes in supergravity2009

    • Author(s)
      Pierre Binetruy
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Connection between classical black hole evaporation conjecture and floating black holes2009

    • Author(s)
      Takahiro Tanaka
    • Journal Title

      Progress of Theoretical Physics

      Volume: 121 Pages: 1133-1140

    • Peer Reviewed
  • [Journal Article] Casimir Effect on the brane2009

    • Author(s)
      Antonino Flachi
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Lorentz boost and non-Gaussianity in multi-field DBI-inflation2009

    • Author(s)
      Shuntaro Mizuno
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] The R-axion and non-Gaussianity2009

    • Author(s)
      Kazunori Nakayama
    • Journal Title

      Physics Letters B

      Volume: 679 Pages: 436-439

    • Peer Reviewed
  • [Journal Article] Non-Gaussianity from isocurvature perturbations : Analysis of trispectrum2009

    • Author(s)
      Etsuko Kawakami
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0909

    • Peer Reviewed
  • [Journal Article] Constraint on the growth factor of the cosmic structure from the damping of the baryon acoustic oscillation signature2009

    • Author(s)
      Gen Nakamura
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology2009

    • Author(s)
      Kazuhiro Yamamoto
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Cosmological Magnetic Fields from Inflation and Backreaction2009

    • Author(s)
      Sugimi Kanno
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0912

    • Peer Reviewed
  • [Journal Article] Holographic Superconductors with Higher Curvature Corrections2009

    • Author(s)
      Ruth Gregory
    • Journal Title

      Journal of High Energy Physics

      Volume: 0910

    • Peer Reviewed
  • [Journal Article] Instability of Small Lovelock Black Holes in Even-dimensions2009

    • Author(s)
      Tomohiro Takahashi
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Einstein-Maxwell-Dilaton theories with a Liouville potential2009

    • Author(s)
      Christos Charmousis
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Chiral Primordial Gravitational Waves from a Lifshitz Point2009

    • Author(s)
      Tomohiro Takahashi
    • Journal Title

      Physical Review Letters

      Volume: 102

    • Peer Reviewed
  • [Journal Article] Precision Calculations of the Gravitational Wave Background Spectrum from Inflation2009

    • Author(s)
      Sachiko Kuroyanagi
    • Journal Title

      Physical Review D

      Volume: 79

    • Peer Reviewed
  • [Journal Article] Slow-Roll Thawing Quintessence2009

    • Author(s)
      Takeshi Chiba
    • Journal Title

      Physical Review D

      Volume: 79

    • Peer Reviewed
  • [Journal Article] Primordial magnetic fields from second-order cosmological perturbations : Tight coupling approximation2009

    • Author(s)
      Satoshi Maeda
    • Journal Title

      Classical and Quantum Gravity

      Volume: 26

    • Peer Reviewed
  • [Journal Article] Asymptotic flatness at spatial infinity in higher dimensions2009

    • Author(s)
      Kentaro Tanabe
    • Journal Title

      Journal of Mathematical Physics

      Volume: 50

    • Peer Reviewed
  • [Journal Article] The Riemannian Penrose inequality and a virtual gravitational collapse2009

    • Author(s)
      Seiju Ohashi
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Primordial magnetic field from non-inflationary cosmic expansion in Horava-Lifshitz gravity2009

    • Author(s)
      Satoshi Maeda
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Large scale evolution of the curvature perturbation in Horava-Lifshitz cosmology2009

    • Author(s)
      Tsutomu Kobayashi
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0908

    • Peer Reviewed
  • [Journal Article] Primordial Non-Gaussianity in Models with Dark Matter Isocurvature Fluctuations2009

    • Author(s)
      Tomo Takahashi
    • Journal Title

      Physical Review D

      Volume: 80

    • Peer Reviewed
  • [Journal Article] Limits on Isocurvature Perturbations from Non-Gaussianity in WMAP Temperature Anisotropy2009

    • Author(s)
      Chiaki Hikage
    • Journal Title

      Monthly Notices of Royal Astronomical Society

      Volume: 398 Pages: 2188-2198

    • Peer Reviewed
  • [Journal Article] Ghost condensate and generalized second law2009

    • Author(s)
      Shinji Mukohyama
    • Journal Title

      Journal of High Energy Physics

      Volume: 0909

    • Peer Reviewed
  • [Journal Article] Thermodynamic and dynamical stability of Freund-Rubin compactification2009

    • Author(s)
      Shunichiro Kinoshita
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0906

    • Peer Reviewed
  • [Journal Article] Scale-invariant cosmological perturbations from Horava-Lifshitz gravity without inflation2009

    • Author(s)
      Shinji Mukohyama
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0906

    • Peer Reviewed
  • [Journal Article] Cosmological Constraints on Rapid Roll Inflation2009

    • Author(s)
      Tsutomu Kobayashi
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 0909

    • Peer Reviewed
  • [Presentation] Testing gravity on the scales of cosmology2009

    • Author(s)
      山本一博
    • Organizer
      Science Opportunities with Wide-Field Imaging and Spectroscopy of the Distant Universe
    • Place of Presentation
      プリストン大学、プリンストン、米国
    • Year and Date
      2009-11-10
  • [Presentation] Cosmology with TMT2009

    • Author(s)
      千葉剛
    • Organizer
      光赤天連シンポジウム『30m地上超大型望遠鏡TMTによる天文学の新展開』
    • Place of Presentation
      国立天文台、三鷹市
    • Year and Date
      2009-10-21
  • [Presentation] Stability of ultra-spinning black holes2009

    • Author(s)
      田中貴浩
    • Organizer
      Future Prospects and Possibilities of Gravity Research
    • Place of Presentation
      APCTP、浦項、韓国
    • Year and Date
      2009-09-20
  • [Presentation] Theory of Cosmological Perturbations2009

    • Author(s)
      佐々木節
    • Organizer
      Corfu Summer Institute : 2nd School & Workshop on Quantum Gravity and Quantum Geometry
    • Place of Presentation
      モン・レポス宮、コルフ、ギリシャ
    • Year and Date
      2009-09-07
  • [Presentation] A thought on conformal frames2009

    • Author(s)
      佐々木節
    • Organizer
      Challenges in Theoretical Cosmology
    • Place of Presentation
      タフツ大学、タロワ、フランス
    • Year and Date
      2009-09-02
  • [Presentation] Floating black boles in braneworld : Classical BH evaporation conjecture2009

    • Author(s)
      田中貴浩
    • Organizer
      Workshop on DM, LHC and Cosmology
    • Place of Presentation
      韓国高等研究所、ソウル、韓国
    • Year and Date
      2009-08-28
  • [Presentation] Aspects of Horava-Lifshitz Cosmology2009

    • Author(s)
      向山信治
    • Organizer
      Invisible Universe 2009
    • Place of Presentation
      パリ宇宙物理研究所、パリ、フランス
    • Year and Date
      2009-07-01
  • [Presentation] Non-Gaussianity from Inflation2009

    • Author(s)
      佐々木節
    • Organizer
      The Unity of the Universe
    • Place of Presentation
      ポーツマス大学、ポーツマス英国
    • Year and Date
      2009-06-29
  • [Presentation] Theoretical developments for BAO surveys2009

    • Author(s)
      松原隆彦
    • Organizer
      FMOS Science Workshop
    • Place of Presentation
      オックスフォード大学、オックスフォード、英国
    • Year and Date
      2009-06-22
  • [Presentation] Non-Gaussian Curvature Perturbations from Multi-Brid Inflation2009

    • Author(s)
      佐々木節
    • Organizer
      4th International Sakharov Conference on Physics
    • Place of Presentation
      レベデフ物理研究所、モスクワ、ロシア
    • Year and Date
      2009-05-18
  • [Presentation] Non-Gaussianity as a probe of the early Universe2009

    • Author(s)
      高橋史宜
    • Organizer
      GCOE国際研究集会「Nonlonear cosmological perturbations」
    • Place of Presentation
      京都大学、京都市
    • Year and Date
      2009-04-21
  • [Presentation] Non-Gaussianity from Multi-brid Inflation2009

    • Author(s)
      佐々木節
    • Organizer
      Focus week on non-Gaussianities in the sky
    • Place of Presentation
      数物連携宇宙研究機構、柏市
    • Year and Date
      2009-04-08
  • [Book] Lectures on Cosmology : Accelerated Expansion of the Universe2010

    • Author(s)
      Shinji Tsujikawa(共著)
    • Total Pages
      200
    • Publisher
      Springer
  • [Book] 宇宙の謎に迫る ブレーンワールド2009

    • Author(s)
      白水徹也
    • Total Pages
      184
    • Publisher
      化学同人
  • [Remarks]

    • URL

      http://www2.yukawa.kyoto-u.ac.jp/~nlg/2010_3/

URL: 

Published: 2012-07-19  

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