瀬川悦生|ETSUO SEGAWA Homepage

所属 横浜国立大学 環境情報研究院
〒240-8501 神奈川県横浜市保土ケ谷区常盤台79-7
Email segawa-etsuo-tb@ynu.ac.jp
専門分野 量子ウォーク, 確率論

Curriculum Vitae

生年月日, 出身地 1978年4月18日 神奈川県 横浜市
学歴 2006年4月 - 2009年3月 横浜国立大学 システム統合工学専攻博士課程
2009年3月 授・博士(工学)
指導教員 / 今野 紀雄
職歴 2009年4月 - 2011年3月 東京工業大学 社会理工学研究科価値システムコース
産学官連携研究員
2011年4月 - 2012年3月 東京大学 情報理工学系研究科数理情報学専攻
特任研究員
2012年4月-2014年7月 東北大学 情報科学研究科 数学連携推進室
助教
2014年8月-2018年9月 東北大学 情報科学研究科 国際連携推進室
准教授
2018年10月- 横浜国立大学 大学院教育強化推進センター
准教授
2019年1月- 横浜国立大学 環境情報研究院
准教授

Publications

  • R. Adami, R. Fukuizumi, E. Segawa,
    "A nonlinear quantum walk induced by a quantum graph with nonlinear delta potentials",
    Quantum Information Processing (2019) 18:119.
    LINK
  • Masaya Maeda, Hironobu Sasaki, Etsuo Segawa, Akito Suzuki, Kanako Suzuki,
    "Dynamics of solitons for nonlinear quantum walks",
    J. Phys. Commun. (2019).
    LINK
  • Bruno Chagas, Renato Portugal, Stefan Boettcher, and Etsuo Segawa,
    "Staggered quantum walk on hexagonal lattices",
    Phys. Rev. A 98, 052310 (2018).
    LINK
  • Masaya Maeda, Hironobu Sasaki, Etsuo Segawa, Akito Suzuki, Kanako Suzuki,
    "Weak limit theorem for a nonlinear quantum walk",
    Quantum Information Processing, (2018) 17:215.
    LINK
  • Mohamed Sabri, Etsuo Segawa, Martin Stefanak,
    "Conditional limit measure of one-dimensional quantum walk with absorbing sink",
    Physical Review A 98 (2018) 012136.
    LINK
  • S. Kubota, E. Segawa, T. Taniguchi, Y. Yoshie,
    "Periodicity of Grover walks on generalized Bethe trees",
    Linear Algebra and its Applications 554 (2018) 371-391.
    LINK
  • Masaya Maeda, Hironobu Sasaki, Etsuo Segawa, Akito Suzuki, Kanako Suzuki,
    "Scattering and inverse scattering for nonlinear quantum walks",
    Discrete & Continuous Dynamical Systems A 38 (2018) 3835-3851.
    LINK
  • Choon-Lin Ho, Yusuke Ide, Norio Konno, Etsuo Segawa, Kentaro Takumi,
    "A spectral analysis of discrete-time quantum walks with related to birth and death chains”,
    Journal of Statistical Physics 171 (2018) 207–219.
    LINK
  • K. Matsue, L. Matsuoka, O. Ogurisu and E. Segawa,
    "Resonant-tunneling in discrete-time quantum walk”,
    Quantum Studies: Mathematics and Foundations 6 (2018) pp. 35–44.
    LINK
  • Yu. Higuchi and E. Segawa,
    "Quantum walks induced by Dirichlet random walks on infinite trees”,
    Journal of Physics A: Mathematics and Theoretical 51 (2018) 075303.
    LINK
  • T. Endo, N. Konno, H. Obuse, E. Segawa,
    "Sensitivity of quantum walks to boundary of two-dimensional lattices: approaches from the CGMV method and topological phases”,
    Journal of Physics A: Mathematics and Theoretical 50 (2017) 455302.
    LINK
  • K. Matsue, O. Ogurisu and E. Segawa,
    "Quantum search on simplicial complexes”,
    Quantum Studies: Mathematics and Foundations 5 (2017) pp 551–577.
    LINK
  • Chul Ki Ko, Norio Konno, Etsuo Segawa, Hyun Jae Yoo,
    "How does Grover walk recognize the shape of crystal lattice?”,
    Quantum Information Processing 17 (2017) pp.167--185.
    LINK
  • L. Matsuoka, E. Segawa, K. Yuki, N. Konno, N. Obata,
    "Asymptotic behavior of a rotational population distribution in a molecular quantum-kicked rotor with ideal quantum resonance",
    Physics Letter A 381 (2017) 1773-–1779.
  • Yu. Higuchi and E. Segawa,
    "The spreading behavior of quantum walks induced by drifted random walks on some magnifier graph",
    Quantum Information and Computation 17 (2017) pp.0399--0414.
  • N. Konno, I. Sato and E. Segawa,
    "The spectra of the unitary matrix of a 2-tessellable staggered quantum walk on a graph",
    Yokohama Mathematical Journal 62 (2017) pp. 52--87.
  • K. Matsue, O. Ogurisu and E. Segawa,
    "A note on the spectral mapping theorem of quantum walk models",
    Interdisciplinary Information Sciences 23 (2017) pp.105—114. DOI: 10.4036/iis.2017.A.13
  • L. Matsuoka and E. Segawa,
    “Localization in rotational excitation of diatomic molecules induced by a train of optical pulses”,
    Interdisciplinary Information Sciences 23 (2017) 51--56. DOI: 10.4036/iis.2017.A.07
  • Yu. Higuchi, N. Konno, I. Sato and E. Segawa,
    “Periodicity of the discrete-time quantum walk on a finite graph”,
    Interdisciplinary Information Sciences 23 (2017), 75--86. DOI: 10.4036/iis.2017.A.10
  • R. Portugal and E. Segawa,
    “Connecting coined quantum walks with Szegedy’s model”,
    Interdisciplinary Information Sciences 23 (2017) 119-125. DOI: 10.4036/iis.2017.A.15.
  • C. K. Ko, E. Segawa and H. J. Yoo,
    "One-dimensional three-state quantum walks: Weak limits and localization",
    Infinite Dimensional Analysis, Quantum Probability and Related Topics 19, (2016) 1650025. DOI: 10.1142/S0219025716500259
  • T.Endo, N.Konno, E.Segawa, and M.Takei,
    "A one-dimensional Hadamard walk with one defect",
    Yokohama Mathematical Journal 60 (2015), 49-90.
  • A.Ichihara, L.Matsuoka, E.Segawa and K.Yokoyama,
    "Isotope-selective dissociation of diatomic molecules by terahertz optical pulses",
    Physical Review A 91, 043404 (2015).
  • E.Segawa,
    "Spectral properties of weighted line digraphs",
    RIMS Kokyuroku 1956 (2015) 16-28.
    arXiv:1506.02855
  • E.Segawa and A.Suzuki,
    "Generator of an abstract quantum walk",
    accepted for publication to Quantum Studies: Mathematics and Foundations 3 (2016), 11-30.
    DOI: 10.1007/s40509-016-0070-1.
    arXiv:1508.07473
  • K.Matsue, O.Ogurisu and E.Segawa,
    "Quantum walks on simplicial complexes",
    Quantum Information Processing, 15, 1865-1896.
    DOI10.1007/s11128-016-1247-6.
    arXiv:1507.01194
  • S.Endo, T.Endo, N.Konno, E.Segawa, and M.Takei,
    "Limit theorems of a two-phase quantum walk with one defect",
    Quantum Information and Computation 15 (2015) 1373–1396,
    arXiv:1409.8134
  • S.Endo, T.Endo, N.Konno, E.Segawa, and M.Takei,
    "Weak limit theorem of a two-phase quantum walk with one defect",
    accepted for publication to Interdisciplinary Information Sciences,
    arXiv:1412.4309
  • T. Machida and E. Segawa,
    "Trapping and spreading properties of quantum walk in homological structure",
    Quantum Information Processing 14 (2015) 1539--1558.
    arXiv:1405.1487
  • Yu. Higuchi, N. Konno, I. Sato and E. Segawa,
    "Spectral and asymptotic properties of Grover walks on crystal lattices",
    Journal of Functional Analysis 267 (2014) 4197–4235.
    arXiv:1401.0154
  • Yusuke Higuchi, Norio Konno, Iwao Sato and E. Segawa,
    "A remark on zeta functions of finite graphs via quantum walks",
    Pacific Journal of Math-for-Industry 6 (2014) 73—84.
    arXiv:1404.1553
  • Y. Ide, N. Konno, E. Segawa and X.P. Xu,
    "Localization of discrete time quantum walks on the glued trees",
    Special Issue "Advances in Information Theory" 16 (2014), 1501-1514,
    doi:10.3390/e16031501, arXiv:1312.114
  • N. Konno, E. Segawa,
    "One-dimensional quantum walks via generating function and the CGMV method",
    Quantum Information Computation 14 (2014) 1165-1186,
    arXiv:1305.1722
  • Yu. Higuchi, N. Konno, I. Sato and E. Segawa,
    "A note on the discrete-time evolutions of quantum walk on a graph",
    Journal of Math-for-Industry, 5 (2013), 103-109,
    arXiv:1207.4987
  • Yu. Higuchi, N. Konno, I. Sato and E. Segawa,
    "Quantum graph walks II: quantum walks on covering graphs",
    Yokohama Mathematical Journal 59 (2013), 57-90,
    arXiv:1211.4719
  • Yu. Higuchi, N. Konno, I. Sato and E. Segawa,
    "Quantum graph walks I: mapping to quantum walks",
    Yokohama Mathematical Journal 59 (2013), 34-56,
    arXiv:1211.0803
  • Norio Konno and Etsuo Segawa,
    "Weak convergence of complex-valued measure for bi-product path space induced by quantum walk",
    Yokohama Mathematical Journal 59 (2013), 1-13,
    arXiv:1208.6089
  • Norio Konno, Nobuaki Obata and Etsuo Segawa,
    "Localization of the Grover walks on spidernets and free Meixner laws",
    Communications in Mathematical Physics, 322 (2013) 667-695,
    arXiv:1206.4422
  • N.Konno and E.Segawa,
    "On the entropy of decoherence matrix for quantum walks",
    Yokohama Mathematical Journal 58 (2012), 65-78,
    arXiv:1202.1376.
  • E.Segawa,
    "Localization of quantum walks induced by recurrence properties of random walks",
    Journal of Computational and Theoretical Nanoscience:
    Special Issue: "Theoretical and Mathematical Aspects of the Discrete Time Quantum Walk",10 (2013), 1583-1590,

    arXiv:1112.4982.
  • Y.Ide, N.Konno and E.Segawa,
    "Time averaged distribution of a discrete-time quantum walk on the path",
    Quantum Information Processing,11 (2012) 1207-1218, arXiv:1112.4036.
  • N.Konno, T.Luczak and E.Segawa,
    "Limit measures of inhomogeneous discrete-time quantum walks in one dimension",
    Quantum Information Processing,12 (2013) 33-53,
    arXiv:1107.4462.
  • K. Chisaki, N.Konno and E.Segawa,
    "Limit theorems for the discrete-time quantum walk on a graph with joined half lines",
    Quantum Information Computation 12, 0314--333(2012),
    arXiv:1009.1306
  • Y.Ide, N.Konno, T.Machida and E.Segawa,
    "Return probability of time-dependent discrete-time quantum walks on the line",
    Quantum Information Computation 11,0761--0773(2011),
    arXiv:1103.1180
  • K.Chisaki, N.Konno, E.Segawa and Y.Shikano,
    "Crossovers induced by discrete-time quantum walks",
    Quantum Information and Computation 11,0741--0760(2011),
    arXiv:1009.2131
  • N.Konno and E.Segawa,
    "Localization of discrete-time quantum walks on a half line via the CGMV method",
    Quantum Information Computation 11,0485--0495(2011),
    arXiv:1008.5109
  • Y.Shikano, K.Chisaki, E.Segawa and N.Konno,
    "Emergence of randomness and arrow of time in quantum walks",
    Physical Review A 81,062129(2010),
    arXiv:1001.3989
  • K.Chisaki, M.Hamada, N.Konno and E.Segawa,
    "Limit Theorems for quantum walks on trees",
    Interdisciplinary Information Sciences 15,423--429(2009),
    arXiv:0903.4508
  • E.Segawa and N.Konno,
    "Limit theorems for quantum walks driven by many coins",
    International Journal of Quantum Information 6,1231--1243(2008),
    arXiv:0807.5074
  • N.Inui, N.Konno and E.Segawa,
    "One-dimensional three-state quantum walk",
    Physical Review E 72,056112(2005),
    arXiv:quant-ph/0507207
  • M.Hamada, N.Konno and E.Segawa,
    "Relation between coined quantum walks and quantum cellular automata",
    RIMS Kokyuroku 1422,1--11(2005),
    arXiv:quant-ph/0408100
2014 ETSUO SEGAWA Allrights reserved.