Unified understandings of space-time structure and non-equilibrium physics

• Project/Area Number: 23244057
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High 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, 素粒子原子核研究所, 教授 (10195258)
• Co-Investigator(Kenkyū-buntansha): ISO Satoshi 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (20242092) ; NISHIMURA Jun 高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (90273218) ; TSUCHIYA Asato 静岡大学, 理学部, 准教授 (20294150) ; AOKI Hajime 佐賀大学, 工学研究科, 教授 (80325589)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥48,100,000 (Direct Cost: ¥37,000,000、Indirect Cost: ¥11,100,000); Fiscal Year 2015: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000); Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000); Fiscal Year 2013: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000); Fiscal Year 2012: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000); Fiscal Year 2011: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000)
• Keywords: 時空構造と非平衡物理学 / 赤外量子揺らぎ / 結合定数の時間変化 / ダークエネルギー / 時空の非平衡物理学 / インフレーション / 行列模型 / 複素ランジュバン法 / 非平衡 / 暗黒エネルギー / 超弦理論 / ブラックホール / ドジッター宇宙 / IIB行列模型 / ゲージ理論 / 超対称性 / ドジッター時空 / 非平衡場の理論 / de Sitter時空 / 赤外量子効果 / メンブレン / AdS/CFT対応 / ローレンツ版IIB行列模型 / 3+1次元 / 膨張する宇宙

Outline of Final Research Achievements

Our collaboration is titled as Unified understandings of space-time structure and non-equilibrium physics. The major achievements of our collaboration are the followings. de Sitter space-time produces its characteristic super-horizon quantum fluctuation.We have pointed out that it could make fundamental couplings time dependent. We have make it clear that this effect is a consequence of the local Lorentz invariance of the general covariant theory. We have also pointed out that this quantum effect with ultra violet infrared mixing, could lead to time dependence of Dark energy and discussed its possible experimental confirmation.

Research Products

• [Journal Article] Dynamical fine-tuning of initial conditions for small field inflation (2016)
  • Author(s): Satoshi Iso, Kazunori Kohri, Kengo Shimada
  • Journal Title: Physical Review D93 Volume: no.8 Issue: 8 Pages: 084009-084009
  • DOI: 10.1103/physrevd.93.084009
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Justification of the complex Langevin method with the gauge cooling procedure (2016)
  • Author(s): K. Nagata, J. Nishimura, S. Shimasaki
  • Journal Title: Prog. Theor. Exp. Phys. Volume: 013B Issue: 1 Pages: 01-01
  • DOI: 10.1093/ptep/ptv173
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Entanglement entropy in scalar field theory on the fuzzy sphere (2016)
  • Author(s): S. Okuno, M. Suzuki and A. Tsuchiya
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2016, 023B03 Issue: 2 Pages: 1-12
  • DOI: 10.1093/ptep/ptv192
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Power-law expansion of the Universe from the bosonic Lorentzian type IIB matrix model (2015)
  • Author(s): Y. Ito, J. Nishimura and A. Tsuchiya
  • Journal Title: Journal of High Energy Physics Volume: 1511, 070 Issue: 11 Pages: 1-22
  • DOI: 10.1007/jhep11(2015)070
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] New Insights into the Problem with a Singular Drift Term in the Complex Langevin Method (2015)
  • Author(s): Jun Nishimura, Shinji Shimasaki
  • Journal Title: Phys.Rev. D92 (2015) no.1, 011501 Volume: 92 Issue: 1 Pages: 011501-011501
  • DOI: 10.1103/physrevd.92.011501
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Evolution of Vacuum Fluctuations of an Ultra-Light Massive Scalar Field generated during and before Inflation (2015)
  • Author(s): Hajime Aoki, Satoshi Iso
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2015 Issue: 11 Pages: 113E02-113E02
  • DOI: 10.1093/ptep/ptv150
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Small field Coleman-Weinberg inflation driven by a fermion condensate (2015)
  • Author(s): Satoshi Iso, Kazunori Kohri, Kengo Shimada
  • Journal Title: PhysRevD Volume: 91 Pages: 1-10
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Holographic description of a quantum black hole on a computer (2014)
  • Author(s): Masanori Hanada, Yoshifumi Hyakutake, Goro Ishiki, Jun Nishimura
  • Journal Title: Science Volume: 344 Issue: 6186 Pages: 882-885
  • DOI: 10.1126/science.1250122
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Realizing three generations of the Standard Model fermions in the type IIB matrix model (2014)
  • Author(s): Hajime Aoki, Jun Nishimura, Asato Tsuchiya
  • Journal Title: JHEP Volume: 1405 Issue: 5 Pages: 131-131
  • DOI: 10.1007/jhep05(2014)131
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Recent developments in the type IIB matrix model (2014)
  • Author(s): J. Nishimura
  • Journal Title: Fortsch.Phys. Volume: 62 Issue: 9-10 Pages: 754-764
  • DOI: 10.1002/prop.201400040
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Evolution of vacuum fluctuations generated during and before inflation (2014)
  • Author(s): H. Aoki, S. Iso and Y. Sekino
  • Journal Title: Physical Review D89 (2014) Volume: 89 Issue: 10 Pages: 103536-103536
  • DOI: 10.1103/physrevd.89.103536
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Realizing the Standard Model particles in the type IIB matrix model (2014)
  • Author(s): 土屋麻人
  • Journal Title: Fortsch. Phys. Volume: 62 Issue: 9-10 Pages: 765-770
  • DOI: 10.1002/prop.201400033
  • Open Access / Acknowledgement Compliant
• [Journal Article] Time Dependent Couplings as Observables in de Sitter Space (2014)
  • Author(s): Hiroyuki Kitamoto, Yoshihisa Kitazawa
  • Journal Title: Int. J. Mod. Phys. A Volume: 29 Issue: 08 Pages: 1430016-1430016
  • DOI: 10.1142/s0217751x14300166
  • Peer Reviewed
• [Journal Article] Radiative Symmetry Breaking from Flat Potential in various U(1)' models (2014)
  • Author(s): Michio Hashimoto, Satoshi Iso, Yuta Orikasa
  • Journal Title: Phys.Rev. Volume: D89 Issue: 5 Pages: 56010-56010
  • DOI: 10.1103/physrevd.89.056010
  • Peer Reviewed
• [Journal Article] Kadanoff-Baym approach to the thermal resonant leptogenesis (2014)
  • Author(s): Satoshi Iso, Kengo Shimada, Masato Yamanaka
  • Journal Title: JHEP Volume: 1404 Issue: 4 Pages: 62-62
  • DOI: 10.1007/jhep04(2014)062
  • Peer Reviewed
• [Journal Article] Radiative symmetry breaking at the Fermi scale and flat potential at the Planck scale (2014)
  • Author(s): Michio Hashimoto, Satoshi Iso, Yuta Orikasa
  • Journal Title: Phys.Rev. Volume: D89 Issue: 1 Pages: 16019-16019
  • DOI: 10.1103/physrevd.89.016019
  • Peer Reviewed
• [Journal Article] Realizing chiral fermions in the type IIB matrix model at finite N (2013)
  • Author(s): Jun Nishimura, Asato Tsuchiya
  • Journal Title: JHEP Volume: 1312 Issue: 12 Pages: 2-2
  • DOI: 10.1007/jhep12(2013)002
  • Peer Reviewed
• [Journal Article] Monte Carlo studies of the spontaneous rotational symmetry breaking in dimensionally reduced super Yang-Mills models (2013)
  • Author(s): Konstantinos N. Anagnostopoulos, Takehiro Azuma, Jun Nishimura
  • Journal Title: JHEP Volume: 1311 Issue: 11 Pages: 9-9
  • DOI: 10.1007/jhep11(2013)009
  • Peer Reviewed
• [Journal Article] Direct test of the AdS/CFT correspondence by Monte Carlo studies of N=4 super Yang-Mills theory (2013)
  • Author(s): Masazumi Honda, Goro Ishiki, Sang-Woo Kim, Jun Nishimura, Asato Tsuchiya
  • Journal Title: JHEP Volume: 1311 Issue: 11 Pages: 200-200
  • DOI: 10.1007/jhep11(2013)200
  • Peer Reviewed
• [Journal Article] Probability distribution over some phenomenological models in the matrix model compactified on a toru (2013)
  • Author(s): Hajime Aoki
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 9 Issue: 9 Pages: 903B04-0
  • DOI: 10.1093/ptep/ptt068
  • Peer Reviewed
• [Journal Article] Note on consistent truncation over higher-dimensional sphere in supergravity (2013)
  • Author(s): M. Sato and A. Tsuchiya
  • Journal Title: Modern Physics Letters Volume: A28 Issue: 23 Pages: 1-4
  • DOI: 10.1142/s0217732313501046
  • Peer Reviewed
• [Journal Article] On the Cancellation Mechanism of Radiation from the Unruh detector (2013)
  • Author(s): Satoshi Iso, Kazuhiro Yamamoto, Sen Zhang
  • Journal Title: PTEP Volume: 6 Issue: 6
  • DOI: 10.1093/ptep/ptt040
  • Peer Reviewed
• [Journal Article] Soft gravitational effects in Kadanoff-Baym approach (2013)
  • Author(s): Hiroyuki Kitamoto, Yoshihisa Kitazawa
  • Journal Title: JHEP Volume: 1310 Issue: 10 Pages: 145-145
  • DOI: 10.1007/jhep10(2013)145
  • Peer Reviewed
• [Journal Article] Soft gravitons screen coupling in de Sitter space (2013)
  • Author(s): Kitamoto, Kitazawa
  • Journal Title: Int.J.Mod.Phys.Conf.Ser. Volume: 21 Pages: 161-162
  • DOI: 10.1142/s2010194513009616
  • Peer Reviewed
• [Journal Article] Probability of the Standard Model Appearance from a Matrix Model (2013)
  • Author(s): Aoki
  • Journal Title: Phys.Rev. D Volume: 87 Issue: 4
  • DOI: 10.1103/physrevd.87.046002
  • Peer Reviewed
• [Journal Article] Infra-red effects of Non-linear sigma model in de Sitter space (2012)
  • Author(s): Hiroyuki Kitamoto, Yoshihisa Kitazawa
  • Journal Title: Physical Review D Volume: 85 Issue: 4 Pages: 44062-44062
  • DOI: 10.1103/physrevd.85.044062
  • Peer Reviewed
• [Journal Article] The Einstein Equation of State as the Clausius Relation with an Entropy (2012)
  • Author(s): Shimada, Okazawa, Iso
  • Journal Title: Phys.Lett. B Volume: 718 Issue: 1 Pages: 193-199
  • DOI: 10.1016/j.physletb.2012.10.010
  • Peer Reviewed
• [Journal Article] Revisiting the Naturalness Problem -- Who is afraid of quadratic divergences? -- (2012)
  • Author(s): Aoki, Iso
  • Journal Title: Phys.Rev. D Volume: 86 Issue: 1
  • DOI: 10.1103/physrevd.86.013001
  • Peer Reviewed
• [Journal Article] Expanding universe as a classical solution in the Lorentzian matrix model for nonperturbative superstring theory (2012)
  • Author(s): Kim, Nishimura, Tsuchiya
  • Journal Title: Physical Review D Volume: 86 Issue: 2
  • DOI: 10.1103/physrevd.86.027901
  • Peer Reviewed
• [Journal Article] Late time behaviors of the expanding universe in the IIB matrix model (2012)
  • Author(s): Kim, Tsuchiya, Nishimura
  • Journal Title: Journal of High Energy Physics Volume: 1210 Issue: 10 Pages: 1-25
  • DOI: 10.1007/jhep10(2012)147
  • Peer Reviewed
• [Journal Article] The Origin of space-time as seen from matrix model simulations (2012)
  • Author(s): J.Nishimura
  • Journal Title: PTEP Volume: 2012 Issue: 1
  • DOI: 10.1093/ptep/pts004
  • Peer Reviewed
• [Journal Article] Expanding (3+1)-dimensional universe from a Lorentzian matrix model for superstring theory in (9+1)-dimensions (2012)
  • Author(s): S.-W.Kim, J.Nishimura and A.Tsuchiya
  • Journal Title: Phys. Rev. Lett Volume: 108 Issue: 1 Pages: 11601-11601
  • DOI: 10.1103/physrevlett.108.011601
  • Peer Reviewed
• [Journal Article] Stochastic Equations in Black Hole Backgrounds and Non-equilibrium Fluctuation Theorems (2011)
  • Author(s): Satoshi Iso, Susumu Okazawa
  • Journal Title: Nucl.Phys.B Volume: 851 Issue: 2 Pages: 380-419
  • DOI: 10.1016/j.nuclphysb.2011.05.021
  • Peer Reviewed
• [Journal Article] Perturbative tests for a large-N reduced model of N=4 super Yang-Mills theory (2011)
  • Author(s): G.Ishiki, S.Shimasaki, A.Tsuchiya
  • Journal Title: Journal of High Energy Physics Volume: 1111 Pages: 1-37
  • Peer Reviewed
• [Journal Article] Direct test of the gauge-gravity correspondence for Matrix theory correlation functions (2011)
  • Author(s): Masanori Hanada, Jun Nishimura, Yasuhiro Sekino, Tamiaki Yoneya
  • Journal Title: JHEP Volume: 1112 Pages: 20-20
  • Peer Reviewed
• [Presentation] Dynamical generation of weak scale - cosmological implication (2016)
  • Author(s): Satoshi Iso
  • Organizer: New Physics at LHC
  • Place of Presentation: Nayang Technological University,Singapore, Singapore
  • Year and Date: 2016-03-02
  • Int'l Joint Research / Invited
• [Presentation] Dynamical fine-tuning of initial conditions of small field inflations (2015)
  • Author(s): Satoshi, Iso
  • Organizer: Annual theory meeting in Taiwan
  • Place of Presentation: NCTS, Shinchu, Taiwan
  • Year and Date: 2015-12-09
  • Int'l Joint Research / Invited
• [Presentation] Exponential and power-law expansion of the Universe from the type IIB matrix model (2015)
  • Author(s): A. Tsuchiya
  • Organizer: Corfu 2015 Workshop on Noncommutative Field Theory and Gravity
  • Place of Presentation: ギリシャコルフ島
  • Year and Date: 2015-09-21
  • Int'l Joint Research / Invited
• [Presentation] 複素ランジュバン法におけるゲージ・クーリングの一般化とその応用 (2015)
  • Author(s): 西村 淳
  • Organizer: 「離散的手法による場と時空のダイナミクス」研究会2015
  • Place of Presentation: 岡山光量子研究所、岡山県岡山市
  • Year and Date: 2015-09-15
  • Invited
• [Presentation] Exponential and power-law expansion of the Universe from the type IIB matrix model (2015)
  • Author(s): A. Tsuchiya
  • Organizer: Numerical approaches to the holographic principle, quantum gravity and cosmology
  • Place of Presentation: 京都大学基礎物理学研究所、京都府京都市
  • Year and Date: 2015-07-21
  • Int'l Joint Research / Invited
• [Presentation] ローレンツ型IIB行列模型における赤外カットオフ効果の数値的研究 (2015)
  • Author(s): 東武大、伊藤祐太、Sang-Woo Kim、西村淳、土屋麻人
  • Organizer: 日本物理学会、2015年年次大会、
  • Place of Presentation: 早稲田大学早稲田キャンパス
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Monte Carlo studies of dynamical compactification of extra dimensions in a model of non-perturbative string theory (2015)
  • Author(s): 東武大、Konstantinos N. Anagnostopoulos、西村淳
  • Organizer: 日本物理学会、2015年年次大会、
  • Place of Presentation: 早稲田大学早稲田キャンパス
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Evolution of Vacuum Fluctuations of an Ultra-Light Massive Scalar Field generated during and before Inflation (2015)
  • Author(s): 青木一，磯暁
  • Organizer: 日本物理学会第70 回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Evolution of Vacuum Fluctuations of an Ultra-Light Massive Scalar Field generated during and before Inflation (2015)
  • Author(s): 青木一
  • Organizer: KEK Theory Workshop 2015
  • Place of Presentation: KEK
  • Year and Date: 2015-01-30
  • Invited
• [Presentation] 簡単化したローレンツ型IIB行列模型の大規模数値計算による 初期宇宙の研究 (2014)
  • Author(s): 伊藤祐太、西村淳、土屋麻人
  • Organizer: 日本物理学会、2014年秋季大会、
  • Place of Presentation: 佐賀大学本庄キャンパス
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] Evolution of vacuum fluctuations generated during and before inflation: Implications for dark energy (2014)
  • Author(s): 青木一，磯暁，関野恭弘
  • Organizer: 日本物理学会秋季大会,
  • Place of Presentation: 佐賀大学本庄キャンパス
  • Year and Date: 2014-09-18 – 2014-09-21
• [Presentation] 離散的手法による場と時空のダイナミクス (2014)
  • Author(s): 土屋麻人
  • Organizer: 行列模型の大規模数値計算による初期宇宙の研究
  • Place of Presentation: 慶応義塾大学
  • Year and Date: 2014-09-12 – 2014-09-15
  • Invited
• [Presentation] Direct Test of the AdS/CFT Correspondence by Monte Carlo Studies of N=4 SYM, (2014)
  • Author(s): 土屋麻人
  • Organizer: 国際研究集会「Aspects of Holography」
  • Place of Presentation: APCTP、 韓国浦項市
  • Year and Date: 2014-07-14 – 2014-07-23
  • Invited
• [Presentation] ローレンツ型IIB行列模型の数値シミュレーションに基づく初期宇宙の指数関数的膨張の研究 (2013)
  • Author(s): 土屋麻人
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
• [Presentation] How the standard model and some phenomenological models appear from the matrix models (2013)
  • Author(s): Aoki
  • Organizer: KEK理論研究会2013
  • Place of Presentation: 高エネルギー加速器研究機構
  • Invited
• [Presentation] 超弦理論の非摂動的定式化の進展と展望 (2012)
  • Author(s): 土屋麻人
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学(兵庫県)(招待講演)
  • Year and Date: 2012-03-25
• [Presentation] (3+1)-dimensional expanding universe from a Lorentzian matrix model for superstring theory in (9+1) dimensions (2012)
  • Author(s): Nishimura
  • Organizer: Progress in Quantum Field Theory and String Theory
  • Place of Presentation: 大阪市立大学
  • Invited
• [Presentation] 3D out of 9D---the birth of our Universe from the superstring theory on computer (2012)
  • Author(s): Nishimura
  • Organizer: Lattice Field Theory in the LHC Era
  • Place of Presentation: バンクーバー、カナダ
  • Invited
• [Presentation] Late time behavior of the expanding universe in the IIB matrix model (2012)
  • Author(s): Tsuchiya
  • Organizer: 離散的手法による場と時空のダイナミクス
  • Place of Presentation: 理化学研究所
  • Invited
• [Presentation] How the standard model can appear from the matrix models (2012)
  • Author(s): Aoki
  • Organizer: 離散的手法による場と時空のダイナミクス
  • Place of Presentation: 理化学研究所
  • Invited
• [Presentation] Recent developments in Monte Carlo studies of superstring theory
  • Author(s): Jun Nishimura
  • Organizer: 研究会「Current Themes in High Energy Physics and Cosmology」
  • Place of Presentation: Nies Bohr Institute、コペンハーゲン、デンマーク
  • Invited
• [Presentation] Recent developments in the type IIB matrix model
  • Author(s): Jun Nishimura
  • Organizer: Corfu Summer Institute「Workshop on Noncommutative Field Theory and Gravity」
  • Place of Presentation: コルフ、ギリシャ
  • Invited
• [Presentation] Phenomenological studies in the matrix models
  • Author(s): Hajime Aoki
  • Organizer: Corfu Summer Institute「Workshop on Noncommutative Field Theory and Gravity」
  • Place of Presentation: コルフ、ギリシャ
• [Presentation] Evolution of vacuum fluctuations generated during and before inflation
  • Author(s): Hajime Aoki
  • Organizer: KEK Theory Workshop 2014
  • Place of Presentation: 高エネルギー加速器研究機構
  • Invited
• [Presentation] Phenomenological studies in the matrix models
  • Author(s): Hajime Aoki
  • Organizer: Workshop 2014 “TeV-scale physics after the discovery of the Higgs particle”
  • Place of Presentation: 東京女子大学
  • Invited
• [Presentation] Expanding (3+1)-dimensional universe from the IIB matrix model
  • Author(s): 土屋麻人
  • Organizer: The International Workshop “Supersymmetries and Quantum Symmetries - SQS'2013”
  • Place of Presentation: Dubna, Russia
  • Invited
• [Presentation] 行列模型による超弦理論の非摂動的定式化
  • Author(s): 土屋麻人
  • Organizer: 原子核3者若手夏の学校
  • Place of Presentation: ホテルたつき
  • Invited
• [Presentation] Realizing the Standard Model particles in the type IIB matrix model
  • Author(s): 土屋麻人
  • Organizer: Workshop on Noncommutative Field Theory and Gravity
  • Place of Presentation: Corfu, Greece
  • Invited
• [Book] 弦理論と行列模型 (2014)
  • Author(s): 土屋麻人
  • Total Pages: 168
  • Publisher: サイエンス社
• [Book] 弦理論と行列模型 (2014)
  • Author(s): 土屋麻人
  • Total Pages: 168
  • Publisher: サイエンス社SGCライブラリ
• [Remarks] 西村淳のホームページ
  • URL: http://research.kek.jp/people/jnishi/
• [Funded Workshop] KEK Theory Workshop 2015Dec (2015)
  • Place of Presentation: KEK，茨城県つくば市
  • Year and Date: 2015-12-01