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Study of homogenization and fluctuations in random media

Research Project

Project/Area Number 16K05200
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Basic analysis
Research InstitutionKyoto University

Principal Investigator

Fukushima Ryoki  京都大学, 数理解析研究所, 准教授 (60527886)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsランダム媒質 / 拡散過程 / ランダム作用素 / 大偏差原理 / 零温度極限 / 局在現象 / 均質化 / ランダムウォーク / アンダーソン模型 / 加法的汎関数 / 中心極限定理 / 不規則媒質 / 確率過程
Outline of Final Research Achievements

First, I studied a homogenization problem for the random Schrodinger and obtained the law of large numbers and central limit theorem under the optimal moment conditions. Second, I studied the random walk conditioned to avoid randomly located obstacles and obtained very sharp description of the geometry of its trajectory. Beside these main achievements, I also studied several localization/delocalization questions in random walk in random environment. In particular, a kind of localization result in the context of large deviation and an improvement for a condition for delocalization at the level of law of large numbers are obtained.

Academic Significance and Societal Importance of the Research Achievements

ランダム媒質における均質化や揺らぎの問題は,不規則な媒質をどこまで均質な媒質で近似できるかという,応用上も重要な問題である.またこの問題は確率論と微分方程式やスペクトル理論の境界に位置しており,それぞれの分野の手法を活用するだけでなく,手法そのものの開発も伴って研究を行う必要がある.本研究課題においてはとくに測度の集中現象と呼ばれる確率論の比較的新しい理論と,解析学における伝統的な摂動論を組み合わせる効果的な方法を見出したこと,および統計物理の問題において計算機科学の分野でよく使われる組み合わせ論的な方法が有効であることを見出したことに学術的意義がある.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (35 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (9 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (19 results) (of which Int'l Joint Research: 16 results,  Invited: 13 results) Remarks (2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Stanford University/University of Pennsylvania/University of Chicago(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] National University of Singapore(シンガポール)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Pontificia Universidad Catolica de Chile(チリ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Technische Universitat Berlin(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of California Los Angeles/University of Pennsylvania/University of Chicago(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Technical University of Berlin/Weierstrass Institute(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] National University of Singapore(シンガポール)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] University of California Los Angeles/Stanford University(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Weierstrass Institute/Technical University of Dresden/Technical University of Berlin(Germany)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Quenched tail estimate for the random walk in random scenery and in random layered conductance2019

    • Author(s)
      Deuschel Jean-Dominique、Fukushima Ryoki
    • Journal Title

      Stochastic Processes and their Applications

      Volume: 129 Issue: 1 Pages: 102-128

    • DOI

      10.1016/j.spa.2018.02.011

    • NAID

      120006644057

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Eigenvalue Fluctuations for Lattice Anderson Hamiltonians: Unbounded Potentials2018

    • Author(s)
      BISKUP Marek、FUKUSHIMA Ryoki、K?NIG Wolfgang
    • Journal Title

      Interdisciplinary Information Sciences

      Volume: 24 Issue: 1 Pages: 59-76

    • DOI

      10.4036/iis.2018.A.03

    • NAID

      130007412788

    • ISSN
      1340-9050, 1347-6157
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Slowdown estimates for one-dimensional random walks in random environment with holding times2018

    • Author(s)
      Amir Dembo、Ryoki Fukushima、Naoki Kubota
    • Journal Title

      Electronic Communications in Probability

      Volume: 23 Issue: none Pages: 1-12

    • DOI

      10.1214/18-ecp191

    • NAID

      120006644043

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Eigenvalue Fluctuations for Lattice Anderson Hamiltonians2016

    • Author(s)
      Marek Biskup, Ryoki Fukushima, and Wolfgang Koenig
    • Journal Title

      SIAM Journal on Mathematical Analysis

      Volume: 48(4) Issue: 4 Pages: 2674-2700

    • DOI

      10.1137/14097389x

    • NAID

      120006644058

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Geometry of the random walk range conditioned on survival among Bernoulli obstacles2019

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Spectra of Random Operator and Related Topics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Much ado about random walk range2019

    • Author(s)
      Ryoki Fukushima
    • Organizer
      The Second Meeting for GlobalMathNetwork
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of the random walk range conditioned on survival among Bernoulli obstacles2019

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Stochastic Processes and Related Topics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of the random walk range conditioned on survival among Bernoulli obstacles2018

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Interplay of Random Media and Stochastic Interface Models
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Zero temperature limit for Brownian directed polymer in Poisonnian disasters2018

    • Author(s)
      Ryoki Fukushima
    • Organizer
      9th International Conference on Stochastic Analysis and its Applications,
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Tail estimates for the random walk in random scenery2018

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Gaussian Free Fields and Related Topics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometry of the random walk range conditioned on survival among Bernoulli obstacles2018

    • Author(s)
      福島竜輝
    • Organizer
      確率論シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Slowdown estimates for random walks with spatially inhomogeneous holding times2018

    • Author(s)
      福島竜輝
    • Organizer
      新潟確率論シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] Quenched tail estimate for the random walk in random scenery2017

    • Author(s)
      福島竜輝
    • Organizer
      The 1-day workshop “Recent Progress in Probability Theory and Its Applications”
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Slowdown estimate for the random hopping time dynamics2017

    • Author(s)
      福島竜輝
    • Organizer
      RIMS camp style seminar "Large scale properties of partial differential equations with random coefficients"
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Eigenvalue fluctuations for lattice Anderson Hamiltonians2017

    • Author(s)
      福島竜輝
    • Organizer
      Potential Analysis and its Related Fields
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A directed polymer in random environment with unbounded jumps2017

    • Author(s)
      福島竜輝
    • Organizer
      Stochastic Analysis on Large Scale Interacting Systems
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Eigenvalue fluctuations for lattice Anderson Hamiltonians2017

    • Author(s)
      Ryoki Fukushima
    • Organizer
      GSIS winter school and workshop 2017
    • Place of Presentation
      東北大学情報科学研究科
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Directed polymers with unbounded jumps2017

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Spring Probability Workshop 2017
    • Place of Presentation
      Institute of Mathematics, Academia Sinica, Taipei
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Eigenvalue Fluctuations for Lattice Anderson Hamiltonians2016

    • Author(s)
      Ryoki Fukushima
    • Organizer
      SIAM Conference on Mathematical Aspects of Materials Science
    • Place of Presentation
      Sheraton Society Hill Hotel, Philadelphia
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Quenched tail estimate for the random walk in random scenery and in random layered conductance2016

    • Author(s)
      Ryoki Fukushima
    • Organizer
      The 7th Pacific Rim Conference on Mathematics
    • Place of Presentation
      Seoul National University
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Quenched tail estimate for the random walk in random scenery2016

    • Author(s)
      福島竜輝
    • Organizer
      日本数学会 2016 年度秋季総合分科会
    • Place of Presentation
      関西大学理工学部
    • Related Report
      2016 Research-status Report
  • [Presentation] Quenched tail estimate for the random walk in random scenery2016

    • Author(s)
      Ryoki Fukushima
    • Organizer
      15TH Stochastic Analysis on Large Scale Interacting Systems
    • Place of Presentation
      東京大学数理科学研究科
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Slowdown estimates for the biased random walk in spatially inhomogeneous holding times2016

    • Author(s)
      Ryoki Fukushima
    • Organizer
      Random Media in Atacama
    • Place of Presentation
      Cumbres Hotel, Atacama
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 研究代表者のwebページ

    • URL

      http://www.kurims.kyoto-u.ac.jp/~ryoki/

    • Related Report
      2017 Research-status Report
  • [Remarks] 所属機関のwebsite

    • URL

      http://www.kurims.kyoto-u.ac.jp/~ryoki/

    • Related Report
      2016 Research-status Report
  • [Funded Workshop] RIMS camp style seminar "Large scale properties of partial differential equations with random coefficients"2017

    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2022-02-21  

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