瀬川悦生|ETSUO SEGAWA Homepage

Affiliation Guraduate School of Information Science
TOHOKU UNIV, Sendai , 980-8579 , JAPAN
Email e-segawa (at) m.tohoku.ac.jp
Research interest Quantum walk , probablity theory

Curriculum Vitae

Date & Place of Birth April 18 ,1978 Yokohama, JAPAN
Education April 2006 - March 2009 Yokohama National University (PhD)
March 2009 Degree, Doctor of Engineering
"Limit theorems for quantum walks with multistate"
Superviser / Norio Konno
Work Experience April 2009 - March 2011 Department of Value and Decision Science,
Tokyo Institute Technology,
Project research fellow
April 2011 - March 2012 Department of Mathematical Informatics,
University of Tokyo,
Project research fellow
April 2012-July 2014 Collaborative Mathematics Reserch Unit,
Graduate School of Information Science,
Tohoku University
Assistant professor
August 2014- International Liaison Office,
Graduate School of Information Science,
Tohoku University
Associate professor

Publications

  • 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
  • Y.Higuchi, N.Konno, I.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.
瀬川悦生|ETSUO SEGAWA Homepage

瀬川悦生|ETSUO SEGAWA Homepage

Affiliation Guraduate School of Information Science
TOHOKU UNIV, Sendai , 980-8579 , JAPAN
Email e-segawa (at) m.tohoku.ac.jp
Research interest Quantum walk , probablity theory

Curriculum Vitae

Date & Place of Birth April 18 ,1978 Yokohama, JAPAN
Education April 2006 - March 2009 Yokohama National University (PhD)
March 2009 Degree, Doctor of Engineering
"Limit theorems for quantum walks with multistate"
Superviser / Norio Konno
Work Experience April 2009 - March 2011 Department of Value and Decision Science,
Tokyo Institute Technology,
Project research fellow
April 2011 - March 2012 Department of Mathematical Informatics,
University of Tokyo,
Project research fellow
April 2012-July 2014 Collaborative Mathematics Reserch Unit,
Graduate School of Information Science,
Tohoku University
Assistant professor
August 2014- International Liaison Office,
Graduate School of Information Science,
Tohoku University
Associate professor

Publications

  • 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.
    DOI: 10.1007/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.