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Researcher Information

last modified：2024/11/22

Associate Professor　YAMAGATA, Koichi

Mail

Faculty, Affiliation

Faculty of Electrical, Information and Communication Engineering,Institute of Science and Engineering
Associate Professor

College and School Educational Field

Division of Electrical Engineering and Computer Science, Graduate School of Natural Science and Technology
Division of Electrical Engineering and Computer Science, Graduate School of Natural Science and Technology
School of Electrical, Information and Communication Engineering, College of Science and Engineering

Laboratory

Quantum information theory laboratory

Academic Background

【Academic background(Doctoral/Master's Degree)】
Osaka University　Doctor　 Graduate School of Science　Department of Mathematics　201303　Completed
Osaka University　Master　Graduate School of Science　Department of Mathematics　201003　Completed

Career

Year & Month of Birth

Academic Society

Award

Specialities

Speciality Keywords

Research Themes

Books

Papers

  • 　Gill and Massar type bound for estimation of SU(2) channel　Koichi Yamagata　Physica Scripta　99　12　125266　2024/11/11　
  • 　Efficiency of estimators for locally asymptotically normal quantum statistical models　Akio Fujiwara,Koichi Yamagata　The Annals of Statistics　51　3　1159　2023/06/01
  • 　Quantum local asymptotic normality based on a new quantum likelihood ratio　Koichi Yamagata,Akio Fujiwara,Richard D. Gill　The Annals of Statistics　41　4　2013/08/01　
  • 　EFFICIENCY OF QUANTUM STATE TOMOGRAPHY FOR QUBITS　Koichi Yamagata　International Journal of Quantum Information　09　04　1167　2011/06　
  • 　Quantum monotone metrics induced from trace non-increasing maps and additive noise　K. Yamagata　Journal of Mathematical Physics　61　5　052202　2020/05/01　

show all

  • 　Maximum logarithmic derivative bound on quantum state estimation as a dual of the Holevo bound　K. Yamagata　Journal of Mathematical Physics　62　6　062203　2021/06/01　
  • 　Noncommutative Lebesgue decomposition and contiguity with applications in quantum statistics　Akio Fujiwara,Koichi Yamagata　Bernoulli　26　3　2105　2020/08
  • 　Information Geometry of Randomized Quantum State Tomography　Akio Fujiwara,Koichi Yamagata　Entropy　20　8　609　2018/08/16　
  • 　Experimental demonstration of adaptive quantum state estimation for single photonic qubits　Ryo Okamoto,Satoshi Oyama,Koichi Yamagata,Akio Fujiwara,Shigeki Takeuchi　Physical Review A　96　2　2017/08/18　
  • 　Intuitive Automatic Music Arrangement System for Wave Files Following Sensitivity Words　Koichi YAMAGATA,Shota MIYOSHI,Maki SAKAMOTO　Proceedings of the Annual Conference of JSAI 2019　JSAI2019　2C5-E-5-05　2019/06
  • 　Computer Vision System for Expressing Texture Using Sound-Symbolic Words　Koichi Yamagata,Jinhwan Kwon,Takuya Kawashima,Wataru Shimoda,Maki Sakamoto　Frontiers in Psychology　12(595986)　1　2021/10/07
  • 　Realization of high-speed adaptive quantum state estimation　Saki Nohara,Ryo Okamoto,Koichi Yamagata,Akio Fujiwara,Shigeki Takeuchi　Japanese Journal of Applied Physics　58　7　072001　2019/06/17　
  • 　Image Retrieval System Using Japanese Sound Symbolic Words for Surface Texture　Koichi YAMAGATA,Tatsuki KAGITANI,Maki SAKAMOTO　International Symposium on Affective Science and Engineering　2B　3　1　2019/03
  • 　Experimental demonstration of adaptive quantum state estimation　Ryo Okamoto,Minako Iefuji,Satoshi Oyama,Koichi Yamagata,Hiroshi Imai,Akio Fujiwara,Shigeki Takeuchi　Optics InfoBase Conference Papers　2013
  • 　Neural Network Model for Visualization of Conversational Mood with Four Adjective Pairs　Koichi Yamagata,Koya Kawahara,Yuto Suzuki,Yuki Nakahodo,Shunsuke Ito,Haruka Matsukura,Maki Sakamoto　AHFE (2023) International Conference. Emerging Technologies in Healthcare and Medicine　116　2023/01
  • 　Automatic Advertisement Copy Generation System from Images　Koichi YAMAGATA,Masato KONNO,Maki SAKAMOTO　Proceedings of the Annual Conference of JSAI 2019　JSAI2019　3J3-E-4-01　2019/06
  • 　A New Way of Making Advertising Copies: Image as Input　Yuji Nozaki,Masato Konno,Koichi Yamagata,Maki Sakamoto　Springer Nature Switzerland AG 2020　LNAI12331　402　2020/07　
  • 　Adaptive Quantum State Estimation of Mixed States Using Photons　Satoshi Oyama,Minako Iefuji,Ryo Okamoto,Koichi Yamagata,Akio Fujiwara,Shigeki Takeuchi　2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)　2013
  • 　COSMOS: accurate detection of somatic structural variations through asymmetric comparison between tumor and normal samples　Koichi Yamagata,Ayako Yamanishi,Chikara Kokubu,Junji Takeda,Jun Sese　Nucleic Acids Research　44　8　e78　2016/02/01　
  • 　Automatic Estimation of Multidimensional Personality From a Single Sound-Symbolic Word　Maki Sakamoto,Junji Watanabe,Koichi Yamagata　Frontiers in Psychology　12　595986　1　2021/04/22
  • 　Experimental Demonstration of Adaptive Quantum State Estimation　Ryo Okamoto,Minako Iefuji,Satoshi Oyama,Koichi Yamagata,Hiroshi Imai,Akio Fujiwara,Shigeki Takeuchi　Physical Review Letters　109　130404　1　2012/09/28　

Conference Presentations

Others

Arts and Fieldwork

Patent

Theme to the desired joint research

Grant-in-Aid for Scientific Research

○「古典および量子統計的システムにおける新規な情報幾何構造の探究」(2017-2021)　
○「量子統計における漸近理論」(2022-2026)　
○「量子力学的システムの統計的性質に内在する情報幾何構造の総合的研究」(2023-2027)　

Competitive research funding,Contribution

Collaborative research,Consignment study

Classes (Bachelors)

○Object-oriented Programming A(2023)
○Object-oriented Programming B(2023)
○Information and Communication Engineering Laboratory II(2023)
○Information and Communication Engineering Laboratory III(2023)
○Advanced Topics on Information & Communication Engineering B(2023)
○Presentation and Debate(2023)
○Student-Initiated Project(2023)

Classes (Graduate Schools)

○Quantum statistics A(2024)
○Quantum statistics B(2024)

International Project

International Students

Lecture themes

Others (Social Activities)

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