Faculty Members


Professor Takuju Zen

Year of birth 1958 Gender Male
Affiliation School of Environmental Science and Engineering
Laboratory for Unified Quantum Devices, Research Institute
Graduate School of Enginering
Faculty of Engineering
Engineering Course, Department of Engineering, Graduate School of Enginering
Special Course for Mid-career Professionals, Department of Engineering, Graduate School of Enginering
Job titles Head, Laboratory for Unified Quantum Devices
Dean, Graduate School of Engineering
Dean, Faculty of Engineering
Head, Engineering Course
Head, Special Course for Mid-career Professionals
Personal web site http://researchmap.jp/T_Zen/

Areas of specialization
Laboratory/research office Theoretical Physics Laboratory
Theoretical physics is an attempt to describe and understand all aspects of the world which are accessible by human intelligence by means of mathematical language. In our laboratory, we focus on research in quantum mechanics, which has many counter-intuitive characteristics. In particular, we are interested in the phenomenon of "quantum anomaly," which manifests in the physics of "quantum graph" and "quantum network," which are artificially manufactured microscopic low dimensional systems. This research is expected to pave the way for direct control of quantum particles and the resultant realization of quantum devices.
Current reseach topics
Educational background 1985: Doctor
1980: Bachelor
Professional background

Academic societies

Courses  * Courses provided in English are shown with (E) mark

Undergraduate school ▼

Quantum Mechanics
Introductory Physics
Fundamental View of Global Society

Graduate school ▼

Research activities

Research papers ▼

  1. Authors: Takuju Zen, Sergey S. Poghosyan
    Title: Spiral orbits and oscillations in historical evolution of empires
    Journal: Physica A, Vol. 469, pp. 353-362, Elsevier
    Year: 2017/01/01
  2. Authors: Atushi Tanaka, Takuju Zen
    Title: Path topology dependence of adiabatic time evolution
    Journal: Functional Analysis and Operator Theory for Quantum Physics. A Festschrift in Honor of Pavel Exner, European Mathematical Society
    Year: 2016/12/01
  3. Authors: Atushi Tanaka, Takuju Zen
    Title: Complete population inversion of Bose particles by an adiabatic cycle
    Journal: New Journal of Physics, Vol. 18, pp. 045023-(7pp), IOP Science
    Year: 2016/04/01
  4. Authors: Takuju Zen, Jun Morimoto
    Title: Balancer effects in opinion dynamics
    Journal: Physics Letters A, Vol. 380, pp. 429-434, Elsevier
    Year: 2016/01
  5. Authors: Takuju Zen
    Title: Graphical representation of marginal and underlying probabilities in quantum mechanics
    Journal: Journal of Korean Physical Society, Vol. 67, pp. 777-784, Springer
    Year: 2015/09
  6. Authors: Takuju Zen, Srgey Poghosyan
    Title: Asymmetric quantum transport in a double-stranded Kronig-Penney model
    Journal: Journal of Japanese Physical Society, Vol. 84, pp. 064006-(8pp), 日本物理学会
    Year: 2015/06
  7. Authors: Atushi Tanaka, Takuju Zen
    Title: Bloch vector, disclination and exotic quantum holonomy
    Journal: Physics Letters A, Vol. 379, pp. 1693-1698, Elsevier
    Year: 2015/05
  8. Authors: Ondrej Turek, Takuju Zen
    Title: Hermitian unitary matrices with modular permutation symmetry
    Journal: Linear Algebra & its Applications, Vol. 469, pp. 569-593, Elsevier Publishing
    Year: 2015/01
  9. Authors: Atushi Tanaka, Sang Wook Kim, Takuju Zen
    Title: Exotic quantum holonomy and higher-order exceptional points in quantum kicked tops
    Journal: Physical Review E, Vol. 89, pp. 042904(1)-042904(8), American Physical Society
    Year: 2014/04
  10. Authors: SERGEY, Poghosyan, Takuju Zen
    Title: Quantum graph vertices with minimal number of passbands
    Journal: Journal of Physical Society of Japan, Vol. 83, pp. 044004(1)-044004(18, Physical Society of Japan
    Year: 2014/04
  11. Authors: Takuju Zen, Atushi Tanaka, Ondrej Turek
    Title: Quantum anholonomy with topology change
    Journal: Acta Polytechnica (Prague) , Vol. 53, pp. 410-415, Czech Acad. Sci.
    Year: 2013/10
  12. Authors: Atushi Tanaka, Nobuhiro Yonezawa, Takuju Zen
    Title: Exotic quantum holonomy and non-Hermitian degeneracies in two-body Lieb-Liniger model
    Journal: J. Phys. A: Math. Theor., Vol. 46, pp. 315302-(17pp), IOP
    Year: 2013/07
  13. Authors: Nobuhiro Yonezawa, Atushi Tanaka, Takuju Zen
    Title: Quantum holonomy in Lieb-Liniger model
    Journal: Phys. Rev. A, Vol. 87, pp. 062113-(6pp), APS
    Year: 2013/06
  14. Authors: Ondrej Turek, Takuju Zen
    Title: Quantum graph as a quantum spectral filter
    Journal: J. Math. Phys., Vol. 54, pp. 032104-(17pp), AIP
    Year: 2013/03
  15. Authors: Ondrej Turek, Takuju Zen
    Title: Potential-controlled filtering in quantum star graphs
    Journal: Annals of Physics (NY), Vol. 330, pp. 104-141, Elsevier
    Year: 2013/01/31
  16. Authors: Taiki Takahashi, Takuju Zen
    Title: A nonlinear neural population coding theory of quantum cognition and decision making
    Journal: World Journal of Neuroscience, Vol. 2, No. 4, pp. 183-186, Scientific Research Publishing
    Year: 2012/11/16
  17. Authors: Takuju Zen, Taiki Takahashi
    Title: Quantum phenomenology of conjunction fallacy
    Journal: J. Phys. Soc. Jpn, Vol. 81, pp. 104801-(5pp), 日本物理学会
    Year: 2012/10/18
  18. Authors: Atsushi Tanaka, Takuju Zen, Sang Wook Kim
    Title: Gauge invariants of eigenspace and eigenvalue anholonomies: examples in hierarchical quantum circuits
    Journal: Journal of Physics A: Mathematical and Theoretical, Vol. 45, pp. 335305-(20pp), IOP Publishing
    Year: 2012/07/31
  19. Authors: Takuju Zen
    Title: Reflectionless and equiscattering quantum graphs and their applications
    Journal: International Journal of System & Measurement, Vol. 5, pp. 34-44, IARIA Journals
    Year: 2012/07/01
  20. Authors: Ondrej TUREK, Takuju Zen
    Title: Threshold resonance and controlled filtering in quantum star graphs
    Journal: Europhysics Letters, Vol. 98, pp. 50005-(5pp), Elsevier
    Year: 2012/06/15
  21. Authors: Ondrej TUREK, Takuju Zen
    Title: Quantum graph vertices with permutation-symmetric scattering probabilities
    Journal: Physics Letters A, Vol. 375, pp. 3775-3780, Elsevier
    Year: 2011/10
  22. Authors: A.Tanaka, S.W. Kim, Takuju Zen
    Title: Eigenvalue and eigenspace anholonomies in hierarchical systems
    Journal: Europhysics Letters, Vol. 96, pp. 10005-(7pp)
    Year: 2011/06/30
  23. Authors: Takuju Zen, P. Exner, O. Turek
    Title: Inverse scattering problem for quantum graph vertices
    Journal: Phys. Rev. A, Vol. 83, pp. 062715-(4pp)
    Year: 2011/06/01
  24. Authors: Takuju Zen, T.Takahashi
    Title: Interference and inequality in quantum decision theory
    Journal: Physics Letters A, Vol. 375, pp. 100-104
    Year: 2010/12/15
  25. Authors: Takuju Zen, P.Exner, O.Turek
    Title: Tripartite connection condition for quantum graph vertex
    Journal: Physics Letters A, Vol. 375, pp. 113-118
    Year: 2010/12/15
  26. Authors: Takuju Zen
    Title: Short-range interaction in three-dimensional quantum mechanics
    Journal: Physics Letters A, Vol. 374, pp. 4585-4588
    Year: 2010/10/15
  27. Authors: Takuju Zen, O.Turek
    Title: Fulop-Tsutsui interactions on quantum graphs
    Journal: Physics Letters A, Vol. 374, pp. 4212-4221
    Year: 2010/09/15
  28. Authors: A.Tanaka, Takuju Zen
    Title: Quantum anholonomies in time-dependent Aharonov-Bohm rings
    Journal: Physical Review A, Vol. 82, pp. 022104-(6pp)
    Year: 2010/08/15
  29. Authors: Takuju Zen, P. Exner, O. Turek
    Title: Approximation of a general singular vertex coupling in quantum graphs, T. Cheon, P. Exner, O. Turek
    Journal: Ann. of Phys. (NY), Vol. 325, pp. 548-578
    Year: 2010
  30. Authors: S.W. Kim, Takuju Zen, A. Tanaka
    Title: Exotic quantum holonomy induced by degeneracy hidden in complex parameter space
    Journal: Phys. Lett. A 1958-1961, Vol. 374
    Year: 2010
  31. Authors: Takuju Zen, A. Tanaka, S.W. Kim
    Title: Exotic quantum holonomy in Hamiltonian systems
    Journal: Phys. Lett. A, Vol. 374, pp. 144-149
    Year: 2009
  32. Authors: Takuju Zen, P. Exner, O. Turek
    Title: Spectral filtering in quantum Y-junction
    Journal: J. Phys. Soc. Jpn., Vol. 78, p. 124004
    Year: 2009
  33. Authors: A. Tanaka, Takuju Zen
    Title:  Unified theory of quantum holonomy
    Journal: Ann. of Phys. (NY), Vol. 324, pp. 3240-3259
    Year: 2009
  34. Authors: Takuju Zen, A. Tanaka
    Title: New anatomy of quantum holonomy
    Journal: Europhys. Lett., Vol. 85, p. 20001
    Year: 2009

Keynote lectures ▼

Invited lectures ▼

  1. , 2016/09/05
  2. , 2016/09/01
  3. , 2016/05/25
  4. , 2016/05/24
  5. , 2016/03/31

Notable projects ▼

Awards ▼

Patents ▼

Grants-in-Aid for Scientific Research from the Japanese government ▼

  1. Project title: Mathematical physics of singular vertices in quantum graphs
    Category: Grant-in-Aid for Scientific Research(C)
    Project number: 24540412
    Project period: 2012/04-2015/03
    Total budget amount: 5,200,000 yen

Competitive research funds ▼

Social activities

Committee roles ▼

Published books ▼