• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2014 Fiscal Year Annual Research Report

量子グラフ理論確立による量子計算能力の限界解明

Research Project

Project/Area Number 23240001
Research InstitutionThe University of Tokyo

Principal Investigator

今井 浩  東京大学, 情報理工学(系)研究科, 教授 (80183010)

Project Period (FY) 2011-04-01 – 2015-03-31
Keywords量子計算理論 / 量子グラフ理論 / 量子コンピュータ / 計算量理論 / グラフマイナー理論 / 量子格子グラフ理論
Outline of Annual Research Achievements

最終年度にあたり、これまでに得られた成果を発展させ、以下のように役割分担する形で効率的に研究を推進し、量子計算能力の限界解明に取り組んだ。
(1) 複数量子計算モデルでの離散数理および物理実現からの研究(今井・村尾・山下):物理実現に基づき、数理的に能力差の有無を示すことができる測定ベース量子計算・トポロジカル量子計算や量子回路など複数の量子計算モデルを対象として、それぞれの有する離散構造の解析を通して、量子回路・レイアウト最適化や状態変換可能性・測定の汎用実装に関するアルゴリズムなどについて広く成果を得ることができた。
(2) 量子グラフ理論の確立【今井・山下・Le Gall】:研究代表者らによる従来の研究成果の中から、これまでの周期グラフ等に関する研究成果に加え、グラフマイナー理論の立場の今井の知見をマトロイド理論に関する研究協力者の知見と合わせて、測定ベース量子計算に関してさらなる応用の可能性を含めた研究指針を見出している。また、グラフのカットの劣モジュラ性最大化について、多面体的な考察も行い、量子アニーリングとの関係解明につながる端緒も得ている。
(3) 多証明者量子対話証明と実数計算量解明【今井・Le Gall・河村】:量子多証明者対話証明について、ジャーナル論文を発表するとともに、量子Arthur-Merlinゲームに関する一般化を示すことができている。実数計算量の解析も行い、さらにこれらの過程で得た知見を量子アルゴリズムへと昇華した成果を発表することもできている。
(4) 計算解析・研究情報データベース構築推進【今井・山下】:回路設計・解析において多数の実績がある山下とともに、古典回路設計理論で重要な2分決定グラフBDDを量子計算において活用するアイデアを展開することができ、国際会議での論文発表を実現した。

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

  • Research Products

    (35 results)

All 2015 2014

All Journal Article (20 results) (of which Peer Reviewed: 19 results,  Open Access: 16 results) Presentation (15 results) (of which Invited: 1 results)

  • [Journal Article] Analysis of the trade-off between spatial and temporal resources for measurement-based quantum computation.2015

    • Author(s)
      J. Miyazaki, M. Hajdusek and M. Murao
    • Journal Title

      Physical Review A, to appear.

      Volume: - Pages: -

    • Peer Reviewed
  • [Journal Article] Quantum algorithm for universal impleemtnation of projective measurement of energy.2015

    • Author(s)
      S. Nakayama, A. Soeda and M. Murao
    • Journal Title

      Physical Review Letters, to appear.

      Volume: - Pages: -

    • Peer Reviewed
  • [Journal Article] Stronger Methods of Making Quantum Interactive Proofs Perfectly Complete.2015

    • Author(s)
      Hirotada Kobayashi, Francois Le Gall and Harumichi Nishimura.
    • Journal Title

      SIAM Journal on Computing, published online

      Volume: - Pages: -

    • DOI

      10.1137/140971944

    • Peer Reviewed / Open Access
  • [Journal Article] Improving Quantum Query Complexity of Boolean Matrix Multiplication Using Graph Collision.2015

    • Author(s)
      Stacey Jeffery, Robin Kothari, Francois Le Gall and Frederic Magniez.
    • Journal Title

      Algorithmica, published online

      Volume: - Pages: -

    • DOI

      10.1007/s00453-015-9985-x

    • Peer Reviewed / Open Access
  • [Journal Article] Thin strip graphs.2015

    • Author(s)
      T. Hayashi, A. Kawamura, Y. Otachi, H. Shinohara, and K. Yamazaki
    • Journal Title

      Discrete Applied Mathematics, to appear

      Volume: - Pages: -

    • DOI

      10.1016/j.dam.2015.01.018

    • Peer Reviewed / Open Access
  • [Journal Article] Simple strategies versus optimal schedules in multi-agent patrolling.2015

    • Author(s)
      A. Kawamura and M. Soejima
    • Journal Title

      Proceedings of the Ninth International Conference on Algorithms and Complexity

      Volume: - Pages: -

    • Peer Reviewed
  • [Journal Article] Parametric Multiroute Flow and Its Application to Robust Network with k Edge Failures.2014

    • Author(s)
      Jean-Francois Baffier, Vorapong Suppakitpaisarn, Hidefumi Hiraishi, and Hiroshi Imai
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 8596 Pages: 26-37

    • DOI

      10.1007/978-3-319-09174-7_3

    • Peer Reviewed / Open Access
  • [Journal Article] BDD Operations for Quantum Graph States.2014

    • Author(s)
      H. Hiraishi and H. Imai
    • Journal Title

      Proc. 6th Int. Conf. on Reversible Computation, LNCS

      Volume: 8507 Pages: 216-229

    • DOI

      10.1007/978-3-319-08494-7_17

    • Peer Reviewed / Open Access
  • [Journal Article] Worst Case Computation Time for Minimal Joint Hamming Weight Numeral System.2014

    • Author(s)
      V. Suppakitpaisarn and H. Imai
    • Journal Title

      Proceedings of the for 2014 International Symposium on Information Theory and Its Applications (ISITA 2014)

      Volume: 1 Pages: 138-142

    • Peer Reviewed / Open Access
  • [Journal Article] 2D Qubit Layout Optimization for Topological Quantum Computation.2014

    • Author(s)
      N. A. B. Adnan, S. Yamashita, S. J. Devitt, K. Nemoto
    • Journal Title

      Proc. 6th Int. Conf. on Reversible Computation, LNCS

      Volume: 8507 Pages: 176-188

    • DOI

      10.1007/978-3-319-08494-7_14

    • Peer Reviewed / Open Access
  • [Journal Article] Mapping Patterns with More Than Two Gates for Quantum Cost Reduction2014

    • Author(s)
      N. A. B. Adnan, K. Hoshi, S. Yamashita
    • Journal Title

      電子情報通信学会第31回量子情報技術研究会資料

      Volume: 2014-11-QIT Pages: 111-112

  • [Journal Article] Information-theoretical formulation of anyonic entanglement2014

    • Author(s)
      K. Kato, F. Furrer and M. Murao
    • Journal Title

      Physical Review A

      Volume: 90 Pages: 62325

    • DOI

      10.1103/PhysRevA.90.062325

    • Peer Reviewed / Open Access
  • [Journal Article] Two-party LOCC convertibility of quadpartite states and Kraus-Cirac number of two-qubit unitaries2014

    • Author(s)
      A. Soeda, S. Akibue and M. Murao
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: 47 Pages: 424036

    • DOI

      10.1088/1751-8113/47/42/424036

    • Peer Reviewed / Open Access
  • [Journal Article] Quantum Complexity of Boolean Matrix Multiplication and Related Problems.2014

    • Author(s)
      Francois Le Gall
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 8808 Pages: 176-191

    • DOI

      10.1007/978-3-319-13350-8_13

    • Peer Reviewed / Open Access
  • [Journal Article] Quantum Algorithms for Matrix Products over Semirings.2014

    • Author(s)
      Francois Le Gall and Harumichi Nishimura
    • Journal Title

      Proceedings of the 14th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT 2014)

      Volume: 1 Pages: 331-343

    • DOI

      10.1007/978-3-319-08404-6_29

    • Peer Reviewed / Open Access
  • [Journal Article] Quantum Algorithms for Finding Constant-sized Sub-hypergraphs.2014

    • Author(s)
      Francois Le Gall, Harumichi Nishimura and Seiichiro Tani
    • Journal Title

      Proceedings of the 20th Annual International Computing and Combinatorics Conference (COCOON 2014)

      Volume: 1 Pages: 429-440

    • DOI

      10.1007/978-3-319-08783-2_37

    • Peer Reviewed / Open Access
  • [Journal Article] Improved Quantum Algorithm for Triangle Finding via Combinatorial Arguments.2014

    • Author(s)
      Francois Le Gall
    • Journal Title

      Proceedings of the 55th Annual IEEE Symposium on Foundations of Computer Science (FOCS 2014)

      Volume: 1 Pages: 216-225

    • DOI

      10.1109/FOCS.2014.31

    • Peer Reviewed / Open Access
  • [Journal Article] Powers of Tensors and Fast Matrix Multiplication.2014

    • Author(s)
      Francois Le Gall
    • Journal Title

      Proceedings of the 39th International Symposium on Symbolic and Algebraic Computation (ISSAC 2014)

      Volume: 1 Pages: 296-303

    • DOI

      10.1145/2608628.2608664

    • Peer Reviewed / Open Access
  • [Journal Article] On characterizations of randomized computation using plain Kolmogorov complexity.2014

    • Author(s)
      S. Hirahara and A. Kawamura
    • Journal Title

      Mathematical Foundations of Computer Science 2014, Lecture Notes in Computer

      Volume: 8635 Pages: 348-359

    • DOI

      10.1007/978-3-662-44465-8_30

    • Peer Reviewed / Open Access
  • [Journal Article] Small complexity classes for operators in analysis2014

    • Author(s)
      A. Kawamura and H. Ota
    • Journal Title

      Mathematical Foundations of Computer Science 2014, Lecture Notes in Computer Science

      Volume: 8635 Pages: 432-444

    • DOI

      10.1007/978-3-662-44465-8_37

    • Peer Reviewed / Open Access
  • [Presentation] Solving a Max Cut Benchmark by an Optimization Solver2015

    • Author(s)
      T. Ikuta, H. Imai, and Y. Yosuke
    • Organizer
      LAシンポジウム
    • Place of Presentation
      京都大学, 京都府
    • Year and Date
      2015-01-28
  • [Presentation] Excluding one of the parties and Markovianizing of tripartite quantum states.2015

    • Author(s)
      Eyuri Wakakuwa, Akihito Soeda and Mio Murao
    • Organizer
      The 18th Conference on Quantum Information Processing (QIP2015)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2015-01-13
  • [Presentation] Network coding for distributed quantum computation over the butterfly and cluster networks.2015

    • Author(s)
      Seiseki Akibue and Mio Murao
    • Organizer
      The 18th Conference on Quantum Information Processing (QIP2015)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2015-01-13
  • [Presentation] Globalness of separable maps characterized by classical correlations without globally causal structure.2015

    • Author(s)
      Seiseki Akibue, Masaki Owari, Go Kato and Mio Murao
    • Organizer
      The 18th Conference on Quantum Information Processing (QIP2015)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2015-01-13
  • [Presentation] Improved Quantum Algorithm for Triangle Finding via Combinatorial Arguments.2015

    • Author(s)
      Francois Le Gall
    • Organizer
      The 18th Conference on Quantum Information Processing (QIP2015)
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      2015-01-12
  • [Presentation] Entanglement as a resource for deterministically simulating acausal classical correlations.2014

    • Author(s)
      Mio Murao
    • Organizer
      Workshop on Quantum Metrology, Interaction and Causal Structure 2014
    • Place of Presentation
      Beijing, China
    • Year and Date
      2014-12-03
  • [Presentation] Extended Formulations of Cut Polytopes and Quantum Correlation/Interaction.2014

    • Author(s)
      H. Imai, H. Hiraishi, and S. Hirahara
    • Organizer
      第31回量子情報技術研究会 (QIT)
    • Place of Presentation
      東北大学, 宮城県
    • Year and Date
      2014-11-18
  • [Presentation] On Extended Complexity of Generalized Transversal Matroids.2014

    • Author(s)
      S. Hirahara and H. Imai
    • Organizer
      電子情報通信学会コンピュテーション研究会
    • Place of Presentation
      中央大学, 東京都
    • Year and Date
      2014-10-08
  • [Presentation] 帰納解析学における小さな計算量級2014

    • Author(s)
      太田浩行,河村彰星
    • Organizer
      日本数学会秋季総合分科会
    • Place of Presentation
      広島大学, 広島県
    • Year and Date
      2014-09-27
  • [Presentation] BDD Representations for Quantum Graph State and Ising Model.2014

    • Author(s)
      H. Hiraishi, H. Imai, Y. Iwata and B. Lin
    • Organizer
      Asian Quantum Information Science Conference 2014 (AQIS 2014)
    • Place of Presentation
      芝蘭会館, 京都府
    • Year and Date
      2014-08-20
  • [Presentation] Algebraic Complexity Theory and Matrix Multiplication.ntanglement as a resource for deterministically simulating acausal classical correlations.2014

    • Author(s)
      Francois Le Gall
    • Organizer
      The 39th International Symposium on Symbolic and Algebraic Computation
    • Place of Presentation
      神戸大学, 兵庫県
    • Year and Date
      2014-07-22
    • Invited
  • [Presentation] 線分および点の警邏について2014

    • Author(s)
      河村彰星,副島真
    • Organizer
      LAシンポジウム
    • Place of Presentation
      半月庵, 山口県
    • Year and Date
      2014-07-17
  • [Presentation] 乱択計算の素朴コルモゴロフ記述量を用いた特徴づけについて2014

    • Author(s)
      河村彰星,平原秀一
    • Organizer
      電子情報通信学会コンピュテーション研究会
    • Place of Presentation
      道後温泉大和屋, 愛媛県
    • Year and Date
      2014-06-14
  • [Presentation] Reduction techniques for Prize Collecting Steiner Tree.2014

    • Author(s)
      T.Akiba, T. Ikuta, H. Imai
    • Organizer
      The Japanese-Swiss Workshop on Combinatorics and Computational Geometry
    • Place of Presentation
      東京大学, 東京都
    • Year and Date
      2014-06-04
  • [Presentation] 細帯グラフ2014

    • Author(s)
      大舘陽太,河村彰星,篠原英裕,林貴史,山崎浩一
    • Organizer
      電子情報通信学会コンピュテーション研究会
    • Place of Presentation
      東北大学, 宮城県
    • Year and Date
      2014-04-24

URL: 

Published: 2016-06-01  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi