KASAMATSU Kenichi

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Name
KASAMATSU Kenichi
Affiliation
Kindai University
Section
Faculty of Science and Engineering, Department of Science, Department of Physics
Job title
Lecturer

Research Areas

 
 

Academic & Professional Experience

 
Apr 2013
 - 
Today
Associate Professor, Dept. of Phys., Kinki Univ.
 
Apr 2008
 - 
Mar 2013
Lecturer, Dept. of Phys. Kinki Univ.
 
Apr 2005
 - 
Mar 2008
Lecturer, Ishikawa National college of Technology
 

Awards & Honors

 
Jan 2013
Outstanding Referee, Americal Physical Society
 

Published Papers

 
Kousuke Ihara, Kenichi Kasamatsu
Phys. Rev. A 100, 013630 (2019)      Apr 2019   [Refereed]
We study transverse instability and disintegration dynamics of a domain wall
of a relative phase in two-component Bose-Einstein condensates with a coherent
Rabi coupling. We obtain analytically the stability phase diagram of the
stationary solutio...
Kasamatsu Kenichi, Mizuno Ryota, Ohmi Tetsuo, Nakahara Mikio
PHYSICAL REVIEW B   99(10)    Mar 2019   [Refereed]
Mithun Thudiyangal, Kasamatsu Kenichi
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS   52(4)    Feb 2019   [Refereed]
Yoshihito Kuno, Shinya Sakane, Kenichi Kasamatsu, Ikuo Ichinose, and Tetsuo Matsui,
Physical Review D   95(9)    May 2017   [Refereed]
Kasamatsu Kenichi, Sakashita Kouhei
PHYSICAL REVIEW A   97(5)    May 2018   [Refereed]
Kuno Yoshihito, Sakane Shinya, Kasamatsu Kenichi, Ichinose Ikuo, Matsui Tetsuo
PHYSICAL REVIEW A   94(6)    Dec 2016   [Refereed]
Takeuchi Hiromitsu, Kobayashi Michikazu, Kasamatsu Kenichi
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   87(2)    Feb 2018   [Refereed]
Kasamatsu Kenichi, Eto Minoru, Nitta Muneto
PHYSICAL REVIEW A   93(1)    Jan 2016   [Refereed]
Kasamatsu Kenichi
PHYSICAL REVIEW A   92(6)    Dec 2015   [Refereed]
Kuno Yoshihito, Kasamatsu Kenichi, Takahashi Yoshiro, Ichinose Ikuo, Matsui Tetsuo
NEW JOURNAL OF PHYSICS   17    Jun 2015   [Refereed]
Elham Hosseini Lapasar, Kenichi Kasamatsu, Síle Nic Chormaic, Takeji Takui, Yasushi Kondo, Mikio Nakahara, and Tetsuo Ohmi
Journal of the Physical Society of Japan   83(4) 044005-1-7   Mar 2014   [Refereed]
Hiromitsu Takeuchi, Kenichi Kasamatsu
   Sep 2013
Nambu-Goldstone modes in immiscible two-component Bose-Einstein condensates
are studied theoretically. In a uniform system, a flat domain wall is
stabilized and then the translational invariance normal to the wall is
spontaneously broken in additi...
Kenichi Kasamatsu, Hiromitsu Takeuchi, Muneto Nitta
J.Phys.Condens.Matter   25 404213-1-14   Sep 2013   [Refereed]
In certain field theoretical models, composite solitons consisting of a
domain wall and vortex lines attached to the wall have been referred to as
D-brane solitons. We show that similar composite solitons can be realized in
phase-separated two-com...
Kenichi Kasamatsu, Ikuo Ichinose, Tetsuo Matsui
Phys. Rev. Lett.   111(11) 115303-1-5   Sep 2013   [Refereed]
Recently, the possibility of quantum simulation of dynamical gauge fields was
pointed out by using a system of cold atoms trapped on each link in an optical
lattice. However, to implement exact local gauge invariance, fine-tuning the
interaction p...
Kenichi Kasamatsu, Hiromitsu Takeuchi, Makoto Tsubota, Muneto Nitta
Phys. Rev. A   88(1) 013620-1-14   Jul 2013   [Refereed]
We study composite solitons, consisting of domain walls and vortex lines
attaching to the walls in two-component Bose-Einstein condensates. When the
total density of two components is homogeneous, the system can be mapped to the
O(3) nonlinear sig...
Takeuchi Hiromitsu, Kasamatsu Kenichi, Nitta Muneto, Tsubota Makoto
JOURNAL OF LOW TEMPERATURE PHYSICS   171(1-2) 156   Apr 2013   [Refereed]
IMPLEMENTATION OF A SELECTIVE TWO-QUBIT GATE OPERATION IN A NEUTRAL ATOM QUANTUM COMPUTER
Lapasar Elham Hosseini, Kasamatsu Kenichi, Kondo Yasushi, Nakahara Mikio, Ohmi Tetsuo
QUANTUM INFORMATION AND QUANTUM COMPUTING   6 43-49   2013   [Refereed]
BOSONS IN AN OPTICAL LATTICE WITH A SYNTHETIC MAGNETIC FIELD
Kasamatsu Kenichi
INTERFACE BETWEEN QUANTUM INFORMATION AND STATISTICAL PHYSICS   7 3-35   2013   [Refereed]
Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota, Muneto Nitta
Phys. Rev. Lett.   109(24) 245301-1-5   Dec 2012   [Refereed]
We show theoretically that a domain-wall annihilation in two-component
Bose-Einstein condensates causes tachyon condensation accompanied by
spontaneous symmetry breaking in a two-dimensional subspace. Three-dimensional
vortex formation from domain...
Muneto Nitta, Kenichi Kasamatsu, Makoto Tsubota, Hiromitsu Takeuchi
Phys. Rev. A   85(5) 053639-1-11   May 2012   [Refereed]
We propose a mechanism to create a vorton or three-dimensional skyrmion in
phase-separated two-component BECs with the order parameters Psi_1 and Psi_2 of
the two condensates. We consider a pair of a domain wall (brane) and an
anti-domain wall (an...
Yuki Nakano, Kenichi Kasamatsu, Tetsuo Matsui
Phys. Rev. A   85(2) 023622-1-11   Feb 2012   [Refereed]
We study finite-temperature phase structures of hard-core bosons in a
two-dimensional optical lattice subject to an effective magnetic field by
employing the gauged CPTex model. Based on the extensive Monte Carlo
simulations, we study their phase...
Akira Kato, Yuki Nakano, Kenichi Kasamatsu, Tetsuo Matsui
Phys. Rev. A 84, 053623 (2011)   84(5) 053623-1-6   Nov 2011   [Refereed]
We study the dynamics of vortex nucleation and lattice formation in a
Bose--Einstein condensate in a rotating square optical lattice by numerical
simulations of the Gross--Pitaevskii equation. Different dynamical regimes of
vortex nucleation are f...
Kasamatsu Kenichi, Takeuchi Hiromitsu, Nitta Muneto, Tsubota Makoto
Journal of Low Temperature Physics   158(1/2) 99-104   Jan 2010   [Refereed]
Elham Hosseini Lapasar, Kenichi Kasamatsu, Yasushi Kondo, Mikio Nakahara, Tetsuo Ohmi
J. Phys. Soc. Jpn.   80 114003-1-10   Aug 2011   [Refereed]
We propose a scalable neutral atom quantum computer with an on-demand
interaction through a selective two-qubit gate operation. Atoms are trapped by
a lattice of near field Fresnel diffraction lights so that each trap captures a
single atom. One-q...
J. A. Seman, E. A. L. Henn, R. F. Shiozaki, G. Roati, F. J. Poveda-Cuevas, K. M. F. Magalhães, V. I. Yukalov, M. Tsubota, M. Kobayashi, K. Kasamatsu, V. S. Bagnato
Laser Physics Letters   8(9) 691-696   Jul 2011   [Refereed]
We have studied a Bose-Einstein condensate of Tex atoms under an oscillatory excitation. For a fixed frequency of excitation, we have explored how the values of amplitude and time of excitation must be combined in order to produce quantum tu...
Minoru Eto, Kenichi Kasamatsu, Muneto Nitta, Hiromitsu Takeuchi, Makoto Tsubota
Phys.Rev.A   83(6) 063603-1-8   Jun 2011   [Refereed]
We study the asymptotic interaction between two half-quantized vortices in
two-component Bose-Einstein condensates. When two vortices in different
components are placed at distance 2R, the leading order of the force between
them is found to be (lo...
Naoya Suzuki, Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota, Hiroki Saito
Phys. Rev. A   82(6) 063604-1-9   Dec 2010   [Refereed]
Dynamical instabilities at the interface between two Bose--Einstein
condensates that are moving relative to each other are investigated using
mean-field and Bogoliubov analyses. Kelvin--Helmholtz instability is dominant
when the interface thicknes...
Kenichi Kasamatsu, Hiromitsu Takeuchi, Muneto Nitta, Makoto Tsubota
Journal of high energy physics   11(068) 1-11   Nov 2010   [Refereed]
We demonstrate theoretically that analogues of D-branes in string theory can
be realized in rotating, phase-separated, two-component Bose-Einstein
condensates and that they are observable using current experimental techniques.
This study raises th...
Hiromitsu Takeuchi, Naoya Suzuki, Kenichi Kasamatsu, Hiroki Saito, Makoto Tsubota
Phys. Rev. B   81(9) 094517-1-5   Mar 2010   [Refereed]
Journal of Low Temperature Physics   158(3/4) 384-390   Feb 2010
Journal of Physics: Conference series150, 032038 (2009)      Mar 2009
Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota
Phys. Rev. A   79(3) 033619-1-5   Mar 2009   [Refereed]
Kenichi Kasamatsu
Phys. Rev. A   79(2) 021604(R)-1-4   Feb 2009   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota
Phys. Rev. A   79(2) 023606-1-7   Feb 2009   [Refereed]
Kasamatsu Kenichi, Tsubota Makoto
JOURNAL OF LOW TEMPERATURE PHYSICS   150(3-4) 599-604   Feb 2008   [Refereed]
Kasamatsu Kenichi
JOURNAL OF LOW TEMPERATURE PHYSICS   150(3-4) 593-598   Feb 2008   [Refereed]
Kasamatsu Kenichi, Tsubota Makoto
JOURNAL OF LOW TEMPERATURE PHYSICS   148(3-4) 357-361   Aug 2007   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota
Phys. Rev. Lett.   97(24) 240404-1-4   Dec 2006   [Refereed]
We present simulation results of the vortex dynamics in a trapped
Bose-Einstein condensate in the presence of a rotating optical lattice.
Changing the potential amplitude and the relative rotation frequency between
the condensate and the optical l...
Kenichi Kasamatsu, Makoto Tsubota
Phys. Rev. A   74(1) 013617-1-14   Jul 2006   [Refereed]
We investigate nonlinear dynamics induced by the modulation instability of a
two-component mixture in an atomic Bose-Einstein condensate. The nonlinear
dynamics is examined using numerical simulations of the time-dependent coupled
Gross-Pitaevskii...
Takeuchi Hiromitsu, Kasamatsu Kenichi, Tsubota Makoto
LOW TEMPERATURE PHYSICS, PTS A AND B   850 57-+   2006   [Refereed]
Kenichi Kasamatsu, Masahiko Machida, Narimasa Sasa, Makoto Tsubota
Phys. Rev. A   71(6) 063616-1-5   Jun 2005   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Int. J. Mod. Phys. B   19(11) 1835-1904   Apr 2005   [Invited]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. A   71(4) 043611-1-14   Apr 2005   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. Lett.   93(25) 250406-1-4   Dec 2004   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota
Phys. Rev. Lett.   93(10) 100402-1-4   Sep 2004   [Refereed]
The dynamics of multiple domain formation caused by the modulation
instability of two-component Bose-Einstein condensates in an axially symmetric
trap are studied by numerically integrating the coupled Gross-Pitaevskii
equations. The modulation in...
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. A   69(4) 043621-1-10   Apr 2004   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. Lett.   91(15) 150406-1-4   Oct 2003   [Refereed]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. A   67(3) 033610-1-14   Mar 2003   [Refereed]
Dynamics of quantized vortices in superfluid helium and rotating Bose-Einstein condensates
Makoto Tsubota, Kenichi Kasamatsu, Tsunehiko Araki
Recent Res. Devel. Physics   4 631-655   2003   [Invited]
Kenichi Kasamatsu, Makoto Tsubota, Masahito Ueda
Phys. Rev. A   66(5) 053606-1-4   Nov 2002   [Refereed]
Makoto Tsubota, Kenichi Kasamatsu, Masahito Ueda
Phys. Rev. A   65(2) 023603-1-4   Jan 2002   [Refereed]
Kenichi Kasamatsu, Yukinori Yasui, Makoto Tsubota
Phys. Rev. A   64(5) 053605-1-11   Oct 2001   [Refereed]
Makoto Tsubota, Kenichi Kasamatsu
J. Phys. Soc. Jpn   69(7) 1942-1945   Jul 2000
The Josephson effect in cyclically coupled Bose-Einstein condensates is
studied theoretically. We analyze the simultaneous Gross-Pitaevskii equations
with coupling terms between adjacent condensates. Depending on the initial
relative phases betwee...

Books etc

 
Novel Superfluids
KASAMATSU Kenichi (Part:Contributor, Chap. 2, pp.156-252: Quantized vortices in superfluid helium and atomic Bose-Einstein condensates)
Oxford Univ. Press   Jan 2013   
Progress in Low Temperature Physics, Volume 16: Quantum Turbulence
Bill Halperin, Makoto Tsubota (Part:Contributor, Chap. 7, pp.351-404: Quantized vortices in atomic Bose-Einstein condensates)
Elsevier Science   Dec 2008   ISBN:0080548105
Physics of Quantum fluids: New Trends and Hot Topics in Atomic and Polariton Condensates, Quantized vortices and quantum turbulence
Springer   Jul 2013   

Conference Activities & Talks

 
井原康輔, 笠松健一
日本物理学会講演概要集(CD-ROM)   22 Mar 2019   
笠松健一, 大見哲巨, 中原幹夫
日本物理学会講演概要集(CD-ROM)   22 Mar 2019   
尾崎裕介, 長尾一馬, 段下一平, 笠松健一
日本物理学会講演概要集(CD-ROM)   22 Mar 2019   
笠松健一, 大見哲巨, 中原幹夫
日本物理学会講演概要集(CD-ROM)   23 Mar 2018   
竹内宏光, 小林未知数, 笠松健一
日本物理学会講演概要集(CD-ROM)   23 Mar 2018   
Kasamatsu Kenichi, Eto Minoru, Nitta Muneto
Meeting Abstracts of the Physical Society of Japan   2016   
<p>2成分BECにおける2つの半整数量子渦がどのような実時間発展を行うのかを2次元Gross-Pitaevskii方程式の数値解析により調べ、異成分間相互作用の性質および渦の循環の方向に依存して非自明な振る舞いをすることを明らかにした。得られた結果を渦点モデルの解析を用いて考察し,その結果の詳細を発表する。</p>
Kasamatsu K., Barbiero Luca, Menotti Chiara, Recati Alessio, Santos Luis
Meeting Abstracts of the Physical Society of Japan   23 Sep 2016   
<p>1次元光格子中の長l距離相互作用をもつハードコアボソンにおいて、粒子のランダムな初期配置から一様粒子分布の平衡状態への緩和の非平衡ダイナミクスをボースハバード模型の厳密な時間発展を用いて調べた。長距離相互作用の強さが増すにつれ、緩和時間が異常に長くなる事を見いだした。この微視的な原因を考察し、多体局在との関連性を議論する。</p>
Kuno Yoshito, Sakane Shinya, Kasamatsu Kenichi, Ichinose Ikuo, Matsui Tetsuo
Meeting Abstracts of the Physical Society of Japan   23 Sep 2016   
<p>強相関ボース原子系の代表例としてボースハバードモデルやその拡張が知られている。3次元光格子上の冷却ボース原子系を使って最近接斥力を追加した拡張ボースハバードモデルが構成できるが,その相互作用パラメータを調節することで,この系はヒッグス場を含む3次元U(1)格子ゲージ理論と等価になる。すなわち冷却原子系が格子ゲージ理論の量子シミュレータとなる。本発表では実際の実験の手引きとなることをめざして,このモデルの相構造やGross-Pitaevskii方程式による時間発展を調べる。</p>
Kuno Y., Kasamatsu K., Takahashi Y., Ichinose I., Matsui T.
Meeting Abstracts of the Physical Society of Japan   2015   
Takeuchi H., Kasamatsu K.
Meeting Abstracts of the Physical Society of Japan   2014   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2014   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2014   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2014   
Takeuchi H., Kasamatsu K., Tsubota M., Nitta M.
Meeting Abstracts of the Physical Society of Japan   2013   
Kasamatsu Kenichi, Ichinose Ikuo, Matsui Tetsuo
Meeting Abstracts of the Physical Society of Japan   2013   
Nitta Muneto, Kasamatsu Kenichi, Tsubota Makoto, Takeuchi Hiromitsu
Meeting Abstracts of the Physical Society of Japan   2012   
Takeuchi H., Kasamatsu K., Tsubota M., Nitta M.
Meeting Abstracts of the Physical Society of Japan   2012   
Kasamatsu K., Takeuchi H., Tsubota M., Nitta M.
Meeting Abstracts of the Physical Society of Japan   2012   
Kasamatsu K., Nakano Y., Matsui T.
Meeting Abstracts of the Physical Society of Japan   2012   
Takeuchi H., Kasamatsu K., Nitta.M., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2011   
Nakano Yuki, Kato Akira, Kasamatsu Kenichi, Matsui Tetsuo
Meeting Abstracts of the Physical Society of Japan   2011   
Kato A., Nakano Y., Kasamatsu K., Matsui T.
Meeting Abstracts of the Physical Society of Japan   2011   
Suzuki Naoya, Takeuchi Hiromitsu, Kasamatsu Kenichi, Tsubota Makoto, Saito Hiroki
Meeting Abstracts of the Physical Society of Japan   2011   
Trapping single atom with optical near-fields
Mar 2010   
Neutral Atom Quantum Computer with On-demand Interaction
10'th Asian Conference on Quantum Information Science   Aug 2010   10'th Asian Conference on Quantum Information Science
Selective two-qubit gate operation in neutral atom quantum computer
Sep 2010   
Nakano Yuki, Kasamatsu Kenichi, Matsui Tetsuo
Meeting Abstracts of the Physical Society of Japan   2010   
Kasamatsu K., Kobayashi M., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2010   
Nakano Yuki, Kasamatsu Kenichi, Matsui Tetsuo
Meeting Abstracts of the Physical Society of Japan   2010   
Kasamatsu K., Kobayashi M., Ueda M., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2010   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2010   
Kasamatsu K., Takeuchi H., Nitta M., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2010   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2009   
Kasamatsu Kenichi
Meeting Abstracts of the Physical Society of Japan   2009   
Takeuchi H., Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2009   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2009   
Kasamatsu K.
Meeting Abstracts of the Physical Society of Japan   2008   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2007   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2006   
SASA Narimasa, MACHIDA Masahiko, KASAMATSU Kenichi, TSUBOTA Makoto
NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   2006   
Dynamics of ultra-cold dilute gaseous Bose-Einstein condensate is described by the time-dependent Gross-Pitaevskii equation.Recently, M.Lobo et.al. and Parker et.al. argue that vortices are nucleated and vortex lattice state finally appear by thei...
Sasa N., Machida M., Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2005   
Sasa N., Machida M., Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2005   
Takeuchi H., Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2005   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2004   
Kasamatsu K, Tsubota M., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2004   
Kasamatsu K., Tsubota M., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2003   
Kasamatsu K., Tsubota M., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2003   
Kasamatsu K., Tsubota M., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2002   
Kasamatsu K, Tsubota M, Ueda M
Meeting Abstracts of the Physical Society of Japan   2002   
Kasamatsu A., Tsubota M., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2001   
Tsubota M., Kasamatsu K., Ueda M.
Meeting Abstracts of the Physical Society of Japan   2001   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2001   
Kasamatsu K., Yasui Y., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   2001   
Kasamatsu K., Tsubota M., Yasui Y.
Meeting Abstracts of the Physical Society of Japan   2000   
Kasamatsu K., Tsubota M.
Meeting Abstracts of the Physical Society of Japan   1999   

Association Memberships

 
 

Research Grants & Projects

 
Project Year: Apr 2018 - Mar 2022    Investigator(s): KASAMATSU Kenichi
Project Year: Apr 2017 - Mar 2020    Investigator(s): NAKAHARA Mikio
Project Year: Apr 2014 - Mar 2018    Investigator(s): KASAMATSU Kenichi
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2006 - 2008    Investigator(s): Makoto TSUBOTA
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(若手研究(B))
Project Year: 2006 - 2008    Investigator(s): Kenichi KASAMATSU