情報理工学位プログラム(旧コンピュータサイエンス専攻)では、所属教員の学術活動の成果発表の一環として、テクニカルレポートを発行しています。
CS-TR-20-25 |
Hisao Kameda "Inferiority Based Measuring Technical Inefficiency of Production" |
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| CS-TR-16-24 |
Hisao Kameda "Magnitudes of Pareto Inefficiency of Atomic and Non-Atomic Nash Equilibria" |
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| CS-TR-14-23 |
Akira Imakura, Lei Du,Tetsuya Sakurai "Accuracy analysis on the Rayleigh-Ritz type of the contour integral based eigensolver for solving generalized eigenvalue problems" |
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| CS-TR-13-22 |
AKIRA IMAKURA , TOMOHIRO SOGABE, SHAO-LIANG ZHANG A LOOK-BACK-TYPE RESTART FOR THE RESTARTED KRYLOV SUBSPACE METHODS TO SOLVE NON-HERMITIAN LINEAR SYSTEMS |
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| CS-TR-13-21 |
Akira Imakura, Lei Du, Tetsuya Sakurai, "Novel interpretation of contour integral spectral projection methods for solving generalized eigenvalue problems" |
| CS-TR-13-20 |
Takahito Kuno and Tomohiro Ishihama, "A Convergent Conical Algorithm with w-Bisection for Concave Minimization" |
情報理工学位プログラムでは情報理工学位プログラムの関連分野の研究・教育の振興、ならびに専攻からの情報発信を目的としてコロキウムを開催しています。専攻教員だけでなく学生や外部講師等による講演会形式で随時開催されます。
| 2024/8/23 16:00～17:00 |
講演者： Takano Taira (The University of Tokyo, Institute of Industrial Science(JSPS Research fellow)) 講演題目：Non-Hermitian Physics in Open and Closed Quantum Systems 講演概要：In this talk, I will provide an overview of my research contributions to two seemingly opposite disciplines that have gained attention through the common framework of non-Hermitian Hamiltonians: closed non-Hermitian quantum mechanics (or PT-symmetric quantum mechanics) and non-Hermitian physics as an effective theory of open quantum systems. PT-symmetric quantum mechanics (PTQM) reconsiders one of the fundamental assumptions of quantum mechanics: that physical quantities must be Hermitian. Instead, PTQM introduces the concept of quasi-Hermitian operators. This concept, first introduced by Geyer et al. in 1990 [1] and popularized by Carl Bender and Stefan Boettcher in 1998 [2], has found successful applications in classical optical waveguide experiments. I will demonstrate that a time-dependent pseudo-Hermitian Hamiltonian is equivalent to a time-independent Hermitian Hamiltonian with moving boundary conditions [3]. Non-Hermitian Hamiltonians also emerge as effective theories in open quantum systems under several assumptions, such as the Born-Markov approximation and post-selection. I will introduce a lesser-known method to derive non-Hermitian Hamiltonians via the Feshbach formalism [4], which does not require approximations on the system. This approach leads to a non-linear non-Hermitian eigenvalue problem that can reveal non-Markovian effects, unobservable under the Born-Markov approximation. As a concrete example, I will briefly discuss our work on the spontaneous decay of a massless Dirac particle in an open system [5], illustrating how non-Markovianity manifests in the survival probability of the decaying particle. [1] Scholtz, F. G., Geyer, H. B., & Hahne, F. J. W. (1992). Annals of Physics, 213(1), 74-101. [2] Bender, C. M., & Boettcher, S. (1998). Physical Review Letters, 80(24), 5243. [3] Fring, A., & Taira, T. (2023). Physical Review A, 108(1), 012222. [4] Feshbach, H. (1962). Annals of Physics, 19(2), 287-313. [5] Taira, T., Hatano, N., & Nishino, A. (2024). arXiv preprint arXiv:2406.17436. 会場： 3F902 セミナー室 世話人：鹿野 豊 (システム情報系 情報工学域) 世話人連絡先：yshikano@cs.tsukuba.ac.jp (内線: 5770) |
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| 2024/5/27 16:00～17:00 |
早川 龍（京都大学白眉センター） "ガイド付きローカルハミルトニアンの計算複雑性" |
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| 2023/11/28 11:00～12:00 |
Dr. Jin Hong (The University of Western Australia) "Quantum Inspired Machine Learning for IDS" |
| 2023/11/13 11:00～12:00 |
Taira Giordani (Sapienza University of Rome) "Certification of coherence, dimension and contextuality in integrated optical quantum circuits" |
| 2023/11/13 10:00～11:00 |
Mostafa Sabri (New York University, Abu Dhabi campus) "Flat bands of periodic graphs" |
| 2023/11/9 16:00～17:00 |
Vikash Mittal (Tsing Hua University) "Deterministic generation of hybrid entangled states using quantum walks" |
| 2022/12/8 13:00～14:00 |
Ariel Shamir (Reichman University) "Non-Photorealistic Vision and Graphics" |
| 2022/9/27 13:00～14:00 |
Ermeson Andrade (Federal Rural University of Pernambuco) "Performability Analysis of Computer Systems" |
| 2019/11/1 10:10～11:30 |
Darrel Whitley (Colorado State University) "Neural Darwinism: Optimal NeuronSelection as Pseudo-Boolean Optimization" |
| 2019/10/17 10:00～11:30 |
Dambrine Julien (Poitiers University) "Interpolation and extrapolation for frontpropagation" |
| 2019/10/17 10:00～11:30 |
Qi Zhang (Heriot-Watt University) "Seismic History Matching & Prediction" |
| 2019/10/9 12:00～13:00 |
Dr. Udo Ernst (University of Bremen) "Flexible information processing in the visual system: How attention configures computation in neural circuits." |
| 2019/8/6 16:00～18:00 |
Ernst Niebur "Perceptual Organization and Attention to Objects" |
| 2019/7/8 14:00～15:00 |
David Ha (Google Brain) "Neuroevolution for Deep Reinforcement Learning Problems" |
| 2018/7/24 13:45～15:45 |
Dr. Susanne Kunkel (Faculty of Science and Technology, Norwegian University of Life
Sciences) "Simulations of Spiking Neuronal Networks using NEST" |
| 2018/4/11 13:45～15:45 |
Dr. J. Michael Herrmann(Institute for Perception, Action and Behaviour,School of
Informatics, University of Edinburgh and Edinburgh Centre for Robotics, Edinburgh, Scotland,
United Kingdom) "Critical Brains for Autonomous Robots" |
| 2017/4/28 10:00～12:00 |
藤原靖宏 "多次元データのための次元削減の高速化" |
| 2016/9/29 16:30～18:30 |
Dr. Sidney Lehky (Researcher at Salk Institute) "Coding of Faces by Tensor Components" |
| 2016/6/24 16:00～18:00 |
我妻 伸彦（東京電機大学（助教）） "NMDA仲介のフィードバックに起因する視覚皮質の図領域表現変調－発火頻度と同期変調の神経回路構造－" |
| 2016/5/18 15:00～16:00 |
Calton Pu (Georgia Institute of Technology (Professor and J.P. Imlay, Jr. Chair in
Software)) "Big Data Research Opportunities in Disaster Management: The LITMUS Landslide Information Service as an Illustrative Example" |
| 2015/6/30 16:00～17:30 |
安東 遼一 (日本学術振興会海外特別研究員（オーストリア科学技術研究所）) "コンピューターグラフィックスのための流体シミュレーション" "長期海外研究生活を送って見える日本での国際競争の勝ち抜き方" |
| 2015/2/10 14:00～16:00 |
John L. Hall (Senior Vice President and General Manager, Oracle University) "From the Classroom to the Boardroom" |
| 2014/4/17 15:00～16:00 |
Changcheng Huang (Professor, Department of Systems and Computer Engineering at Carleton
University, Ottawa, Canada) "Vulnerability Evaluation for Securely Offloading Mobile Apps to Cloud" |
| 2014/3/4 15:00～16:15 |
Wen-Tsuen Chen (Distinguished Research Fellow, Academia Sinica, Taipei, Taiwan) "Intelligent Sensing for Better Life and Better Environment" |
| 2014/2/12 15:15～16:00 |
Dr. Wan-Chun Alex Ma (Researcher at Weta Digital) "Automation: The Final Frontier for Visual Effects" |
| 2014/1/23 16:00～ |
Dr. Sidney Lehky (Salk Institute, Computational Neuroscience Laboratory) "Dimensionality of object representations in monkey inferotemporal cortex" |
| 2014/1/20 16:00～ |
谷口 康祐 (北海道大学 大学院文学研究科心理システム科学講座) "心理学的研究手法によるオブジェクト認知構造の検討 ―形態情報に関する検出とカテゴリー化の処理過程―" |
情報理工学位プログラム(旧コンピュータサイエンス専攻)は、平成13年度以降、多数の学位(修士)取得者を社会に送り出しています。
平成13年度｜ 平成14年度｜ 平成15年度｜ 平成16年度｜ 平成17年度｜ 平成18年度｜ 平成19年度｜ 平成20年度｜ 平成21年度｜ 平成22年度｜ 平成23年度｜ 平成24年度｜ 平成25年度｜ 平成26年度｜ 平成27年度｜ 平成28年度｜ 平成29年度｜ 平成30年度｜ 令和元年度｜ 令和2年度｜ 令和3年度
