Isao Maruyama

J-GLOBAL         Last updated: Oct 24, 2018 at 19:05
 
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Name
Isao Maruyama
URL
http://www.fit.ac.jp/~i-maruyama
Affiliation
Fukuoka Institute of Technology
Section
Faculty of Information Engineering Department of Information and Systems Engineering
Research funding number
20422339

Academic & Professional Experience

 
Apr 2013
 - 
Today
Associate Professor, Fukuoka Institute of Technology
 
Oct 2008
 - 
Mar 2013
Osaka Univ.
 
Apr 2007
 - 
Sep 2008
Tokyo Univ.
 
Oct 2005
 - 
Mar 2007
Tokyo Univ.
 
Apr 2005
 - 
Sep 2005
Bonn Univ.
 

Research Grants & Projects

 
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2005 - 2006    Investigator(s): Yasuhiro HATSUGAI
There is a fundamental class of many-body quantum states that do not possess relevant symmetry breaking. It includes quantum Hall states, anisotropic superconductors, graphene, Kondo insulators, quantum spins with frustrations and so on. In these ...

Misc

 
Isao Maruyama, Shin Miyahara
   Aug 2018
We study the fractionally quantized Tex Berry phase, Tex, to characterize local
Tex-mer spin structures at magnetization plateaux in spin-1/2 Heisenberg
multimer(Tex-mer) model...
Sunnardianto Gagus Ketut, Maruyama Isao, Kusakabe Koichi
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY   42(37) 23691-23697   Sep 2017   [Refereed]
Sunnardianto, Gagus Ketut; Maruyama, Isao; Kusakabe, Koichi
Advanced Science, Engineering and Medicine   8 421-426(6)   Jun 2016   [Refereed]
Olabode M. Sule, Hitesh J. Changlani, Isao Maruyama, Shinsei Ryu
Phys. Rev. B.   92 075128-(1-12)   Aug 2015   [Refereed]
We provide evidence for the mapping of critical spin-1 chains, in particular
the SU(3) symmetric model with additional interactions, to free boson theories
using exact diagonalization and the density matrix renormalization group
algorithm. Using t...
KATSURA HOSHO, MARUYAMA ISAO
固体物理   50(5) 257-270   May 2015
Naoki Morishita, Gagus Ketut Sunnardianto, Koichi Kusakabe, Isao Maruyama, Kazuyuki Takai, Toshiaki Enoki
   Dec 2014
Electron correlation effects caused by the topological zero mode of a
hydrogenated graphene vacancy, Tex, with three adsorbed hydrogen atoms is
discussed theoretically. A Kondo model is derived from the multi-reference
representation of the ...
MARUYAMA ISAO
福岡工業大学情報科学研究所所報   25 43-44   Oct 2014
KAGAWA AKINORI, NEGORO MAKOTO, KITANO TAKAHIRO, TATEISHI KEN'ICHIRO, NISHIDA SHINSUKE, MORITA YASUSHI, MARUYAMA ISAO, KITAGAWA MASAHIRO
日本物理学会講演概要集   69(2) 109   Aug 2014
MORISHITA NAOKI, SUNNARDIANTO GAGUS KETUT, MARUYAMA ISAO, KUSAKABE KOICHI
日本物理学会講演概要集   69(2) 601   Aug 2014
Hirofumi Sakakibara, Katsuhiro Suzuki, Hidetomo Usui, Satoaki Miyao, Isao Maruyama, Koichi Kusakabe, Ryotaro Arita, Hideo Aoki, Kazuhiko Kuroki
Phys. Rev. B 89 224505(2014)      Mar 2014
By constructing Tex two-orbital models from first
principles, we have obtained a systematic correlation between the Fermi surface
warping and the evaluated Tex for various bilayer as well as single-layer
cuprates. This reveals ...
MIYAO SATOAKI, IWATANI KEISUKE, SAKAKIBARA HIROFUMI, MARUYAMA ISAO, KUROKI KAZUHIKO, KUSAKABE KOICHI
日本物理学会講演概要集   69(1) 640   Mar 2014
MARUYAMA ISAO
日本物理学会講演概要集   69(1) 4   Mar 2014
Satoaki Miyao, Hirofumi Sakakibara, Isao Maruyama, Kazuhiko Kuroki, Koichi Kusakabe
JPS Conf. Proc.   3 015008-1-6   2014   [Refereed]
To show an optimization method of element substitution for cuprate
superconductors, we investigate Fermi surface shape of TlR2A2Cu3O9 with R=La,
Y, and A=Li, Na, K, Rb, Cs. We adopt the generalized gradient approximation in
the density-functional ...
KAGAWA AKINORI, KITANO TAKAHIRO, NEGORO MAKOTO, MARUYAMA ISAO, KITAGAWA MASAHIRO
Abstr Annu Meet NMR Soc Jpn   52nd 386-389   Nov 2013
MIYAO SATOAKI, SAKAKIBARA HIROFUMI, MARUYAMA ISAO, KUROKI KAZUHIKO, KUSAKABE KOICHI
日本物理学会講演概要集   68(2) 501   Aug 2013
MARUYAMA ISAO, KUSAKABE KOICHI
日本物理学会講演概要集   68(1) 331   Mar 2013
MIYAO SATOAKI, MARUYAMA ISAO, KUROKI KAZUHIKO, KUSAKABE KOICHI
日本物理学会講演概要集   68(1) 656   Mar 2013
KUDO YASUHIKO, TAKAI KAZUYUKI, ENOKI TOSHIAKI, KETUT S. GAGUS, MARUYAMA ISAO, KUSAKABE KOICHI
日本物理学会講演概要集   68(1) 923   Mar 2013
YAMADA KOTARO, MARUYAMA ISAO, KUSAKABE KOICHI
日本物理学会講演概要集   67(2) 772   Aug 2012
UEDA HIROSHI, MARUYAMA ISAO
日本物理学会講演概要集   67(2) 290   Aug 2012
KUSAKABE KOICHI, MARUYAMA ISAO, MAXIM ZIATDINOV, FUJII SHINTARO, KIGUCHI MANABU, MORI TAKEHIKO, ENOKI TOSHIAKI
日本物理学会講演概要集   67(2) 807   Aug 2012
MARUYAMA ISAO
日本物理学会講演概要集   67(2) 225   Aug 2012
HIKIHARA TOSHIYA, KATSURA HOSHO, MARUYAMA ISAO, NISHINO TOMOTOSHI
日本物理学会誌   67(6) 394-398,374   Jun 2012
Tanaya S., Maruyama I., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   67(1)    Mar 2012
Ueda Hiroshi, Maruyama Isao
Meeting abstracts of the Physical Society of Japan   67(1)    Mar 2012
Hatsugai Y., Maruyama I.
Meeting abstracts of the Physical Society of Japan   67(1)    Mar 2012
Yamada Kotaro, Maruyama Isao, Kusakabe Koichi
Meeting abstracts of the Physical Society of Japan   67(1)    Mar 2012
HATSUGAI YASUHIRO, MARUYAMA ISAO
日本物理学会講演概要集   67(1) 383   Mar 2012
YAMADA KOTARO, MARUYAMA ISAO, KUSAKABE KOICHI
日本物理学会講演概要集   67(1) 646   Mar 2012
Hiroshi Ueda, Isao Maruyama
   Dec 2011
We introduce a matrix product state (MPS) with an incommensurate periodicity
by applying the spin-rotation operator of each site to a uniform MPS in the
thermodynamic limit. The incommensurate MPS is applied to the spin Tex
ferro-antiferro zig...
Hiroshi Ueda, Isao Maruyama
   Nov 2011
As a method beyond the mean-field analysis, a matrix product state (MPS) with
incommensurate periodicity is applied to detect phase transitions accompanied
with periodicity change, where the incommensurate MPS is generated by acting
local-spin-rot...
I. Maruyama
   Sep 2011
We show how entangled valence-bond singlet pairs are disentangled partially
and totally by the Kennedy-Tasaki transformation which reveals the hidden
Tex symmetry in valence-bond-solid chains as a higher-spin
generalization of the prev...
Isao Maruyama, Hosho Katsura, Toshiya Hikihara
Phys. Rev. B 84, 165132 (2011)      Aug 2011
We study free fermion systems with the sine-square deformation (SSD), in
which the energy scale of local Hamiltonians is modified according to the
scaling function f(x)=sin^2[\pi(x-1/2)/L], where x is the position of the local
Hamiltonian and L is...
Isao Maruyama, Sho Tanaya, Mitsuhiro Arikawa, Yasuhiro Hatsugai
   Mar 2011
We have studied the Tex topological number defined by the Berry phase for
the gapped frustrated systems including the orthogonal dimer model which has a
direct product state of local quantum clusters as the exact ground state. The
Tex topologi...
Hatsugai Y., Maruyama I.
Meeting abstracts of the Physical Society of Japan   66(1)    Mar 2011
Koichi Kusakabe, Isao Maruyama
   Dec 2010
Some theorems on derivatives of the Coulomb density functional with respect
to the coupling constant Tex are given. Consider an electron density
Tex given by a ground state. A model Fermion system with the
reduced coupling cons...
Hiroshi Ueda, Isao Maruyama, Kouichi Okunishi
J. Phys. Soc. Jpn. 80 (2011) 023001      Nov 2010
We study a uniform matrix product state as a variational state for classical
and quantum spin chains in the thermodynamic limit. Under a careful treatment
of the translational symmetry, eigen values of the transfer matrix defined in
the calculatio...
Y. Hatsugai, I. Maruyama
EPL, 95 (2011) 20003      Sep 2010
Adiabatic Tex invariants by quantized Berry phases are defined for gapped
electronic systems in Tex-dimensions (Tex). This series includes
Polyacetylene, Kagome and Pyrochlore lattice respectively for Tex and 3.
The invariants are quantu...
Maruyama Isao, Katsura Hosho
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Ueda H., Maruyama I.
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Tanaya S., Arikawa M., Maruyama I., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Orii Masashi, Ueda Hiroshi, Maruyama Isao
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Kusakabe K., Maruyama I.
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Hatsugai Y., Maruyama I.
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
Isao Maruyama, Hosho Katsura
J. Phys. Soc. Jpn. 79 (2010) 073002      Mar 2010
We study a matrix product representation of the Bethe ansatz state for the
Lieb-Linger model describing the one-dimensional Bose gas with delta-function
interaction. We first construct eigenstates of the discretized model in the
form of matrix pro...
Mitsuhiro Arikawa, Isao Maruyama, Yasuhiro Hatsugai
Phys. Rev. B 82, 073105 (2010)      Mar 2010
A crossover between the Bose Einstein condensation (BEC) and BCS
superconducting state is described topologically in the chiral symmetric
fermion system with attractive interaction. Using a local Z_2 Berry phase, we
found a quantum phase transitio...
Tanaya S., Maruyama I., Arikawa M., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   65(1)    Mar 2010
Hosho Katsura, Isao Maruyama
J. Phys. A: Math. Theor. 43 (2010) 175003      Nov 2009
We derive a matrix product representation of the Bethe ansatz state for the
XXX and XXZ spin-1/2 Heisenberg chains using the algebraic Bethe ansatz. In
this representation, the components of the Bethe eigenstates are expressed as
traces of product...
Maruyama Isao, Katsura Hosho, Tanaka Akinori, Tasaki Hal
Meeting abstracts of the Physical Society of Japan   64(2)    Aug 2009
Arikawa M., Maruyama I., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   64(2)    Aug 2009
Tanaka Akinori, Katsura Hosho, Maruyama Isao, Tasaki Hal
Meeting abstracts of the Physical Society of Japan   64(2)    Aug 2009
Hosho Katsura, Isao Maruyama, Akinori Tanaka, Hal Tasaki
Europhys Lett. 91, 57007 (2010)      Jul 2009
We introduce and study two classes of Hubbard models with magnetic flux or
with spin-orbit coupling, which have a flat lowest band separated from other
bands by a nonzero gap. We study the Chern number of the flat bands, and find
that it is zero f...
Sogo Shinji, Seike Atsushi, Maruyama Isao, Nakano Hiroki, Kusakabe Koichi
Meeting abstracts of the Physical Society of Japan   64(1)    Mar 2009
Maruyama Isao, Tanaya Syou, Arikawa Mitsuhiro, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   64(1)    Mar 2009
Arikawa M., Maruyama I., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   64(1)    Mar 2009
Mitsuhiro Arikawa, Shou Tanaya, Isao Maruyama, Yasuhiro Hatsugai
Phys. Rev. B 79, 205107 (2009)      Dec 2008
A topological insulator and its spin analogue as a gapped spin liquid have
characteristic low energy excitations (edge states) within the gap when the
systems have boundaries. This is the bulk-edge correspondence, which implies
that the edge state...
Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   63(2)    Aug 2008
Tanaya S., Maruyama I., Arikawa M., Hatsugai Y.
Meeting abstracts of the Physical Society of Japan   63(2)    Aug 2008
I. Maruyama, T. Hirano, Y. Hatsugai
   Jul 2008
A spin-1/2 frustrated two-leg ladder with four-spin exchange interaction is
studied by quantized Berry phases. We found that the Berry phase successfully
characterizes the Haldane phase in addition to the rung-singlet phase, and the
dominant vecto...
I. Maruyama, Y. Hatsugai
   Jun 2008
We have numerically studied a non-adiabatic charge transport in the quantum
Hall system pumped by a magnetic flux, as one of the simplest theoretical
realizations of non-adiabatic Thouless pumping. In the adiabatic limit, a
pumped charge is quanti...
I. Maruyama, T. Hirano, Y. Hatsugai
   Jun 2008
A spin-1/2 two-leg ladder with four-spin ring exchange is studied by
quantized Berry phases, used as local order parameters. Reflecting local
objects, non-trivial (Tex) Berry phase is founded on a rung for the
rung-singlet phase and on a plaquet...
Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   63(1)    Feb 2008
Yoshihiro Kuge, Isao Maruyama, Yasuhiro Hatsugai
   Feb 2008
Topological aspects of surface states in semiconductors are studied by an
adiabatic deformation which connects a realistic system and a decoupled
covalent-bond model. Two topological invariants are focused. One is a quantized
Berry phase, and the ...
MARUYAMA Isao, HATSUGAI Yasuhiro
Journal of the Physical Society of Japan   76(11) "113601-1"-"113601-4"   Nov 2007
Quantized Berry phases used as local order parameters in t-J models are studied. A texture pattern of the local order parameters is topologically stable due to the quantization of non-Abelian Berry phases defined by low-energy states below a spin ...
Hirano Takaaki, Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   62(2)    Aug 2007
Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   62(2)    Aug 2007
Isao Maruyama, Yasuhiro Hatsugai
   Aug 2007
Quantized Berry phases as local order parameters in t-J models are studied. A
texture pattern of the local order parameters is topologically stable due to
the quantization of non-Abelian Berry phases defined by low-energy states below
a spin gap, ...
Hui Song, Isao Maruyama, Yasuhiro Hatsugai
   May 2007
We investigate the integer quantum Hall system in a two dimensional lattice
model with spatially correlated disorder by using the efficient method to
calculate the Chern number proposed by Fukui \textit{et al}. Distribution of
charge density indic...
Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   62(1)    Feb 2007
Isao Maruyama, Tetsuji Koide, Yasuhiro Hatsugai
   Oct 2006
A new type of external fields violating the particle number preservation is
studied in one-dimensional strongly correlated systems by the Density Matrix
Renormalization Group method. Due to the U(1) symmetry breaking, the ground
state has fluctuat...
I. Maruyama, N. Shibata, K. Ueda
Physica B, 378-380, 938-939 (2006)      Oct 2006
The Fano-Kondo effect in zero-bias conductance is studied based on a
theoretical model for the T-shaped quantum dot by the finite temperature
density matrix renormalization group method. The modification of the two Fano
line shapes at much higher ...
Maruyama Isao, Hatsugai Yasuhiro
Meeting abstracts of the Physical Society of Japan   61(2)    Aug 2006
MARUYAMA Isao, SHIBATA Naokazu, UEDA Kazuo
Journal of the Physical Society of Japan   73(12) 3239-3242   Dec 2004
The Fano-Kondo effect in zero-bias conductance is investigated based on a theoretical model of a T-shaped quantum dot The conductance as a function of gate voltage is generally characterized by the Fano asymmetric parameter q. With varying tempera...
Isao Maruyama, Naokazu Shibata, Kazuo Ueda
J. Phys. Soc. Jpn. 73, 3239 (2004).      Oct 2004
The Fano-Kondo effect in zero-bias conductance is investigated based on a
theoretical model for the T-shaped quantum dot. The conductance as a function
of the gate voltage is generally characterized by a Fano asymmetric parameter
q. With varying t...
Maruyama Isao, Shibata Naokazu, Ueda Kazuo
Meeting abstracts of the Physical Society of Japan   59(2)    Aug 2004
Isao Maruyama, Naokazu Shibata, Kazuo Ueda
J. Phys. Soc. Jpn 73, 434-440 (2004)      Jun 2004
With the Finite temperature Density Matrix Renormalization Group method
(FT-DMRG), we depeloped a method to calculate thermo-dynamical quantities and
the conductance of a quantum dot system. Conductance is written by the local
density of states on...
Isao Maruyama, Naokazu Shibata, Kazuo Ueda
Phys. Rev. B 65, 174421 (2002)      Jun 2004
Properties of a nonmagnetic impurity in Kondo insulators are investigated by
considering a one-dimensional Kondo lattice model with depletion of a localized
spin. The ground-state phase diagram determined by the Lanczos method shows
that the magne...
Maruyama Isao, Shibata Naokazu, Ueda Kazuo
Meeting abstracts of the Physical Society of Japan   59(1)    Mar 2004
MARUYAMA Isao, SHIBATA Naokazu, UEDA Kazuo
Journal of the Physical Society of Japan   73(2) 434-440   Feb 2004
With the finite temperature density matrix renormalization group method (FT-DMRG), we have developed a method to calculate thermodynamic quantities and the conductance of a quantum dot system. Conductance is written by the local density of states ...
Maruyama Isao, Shibata Naokazu, Ueda Kazuo
Meeting abstracts of the Physical Society of Japan   58(2)    Aug 2003
Maruyama Isao, Shibata Naokazu, Ueda Kazuo
Meeting abstracts of the Physical Society of Japan   58(1)    Mar 2003
G. K. Sunnardianto, I. Maruyama, K. Kusakabe
J. Comput. Theor. Nanosci.   13 4883-4887   Aug 2016   [Refereed]