Etsuko Itou

J-GLOBAL         Last updated: Aug 5, 2019 at 11:04
 
Avatar
Name
Etsuko Itou
Affiliation
Keio University
Section
Research and Education Center for Natural Sciences
Research funding number
50432464

Research Areas

 
 

Education

 
Apr 1996
 - 
Mar 2000
Osaka University
 

Published Papers

 
Toshiaki Fujimori, Etsuko Itou, Tatsuhiro Misumi, Muneto Nitta, Norisuke Sakai
   Jul 2019
The Tex sigma model at finite temperature is studied using
lattice Monte Carlo simulations on Tex with radii
Tex and Tex, respectively, where the ratio of the circumferences is
taken to be suf...
Etsuko Itou
Journal of High Energy Physics   1905 093   May 2019   [Refereed]
Motivated by recent studies on the resurgence structure of quantum field theories, we numerically study the nonperturbative phenomena of the SU(Tex) gauge theory in a weak coupling regime. We found that topological objects with a fractional charge...
Takehiro Hirakida, Etsuko Itou, Hiroaki Kouno
   Nov 2018   [Refereed]
We present the scale-setting function and the equation of state of the pure SU(2) gauge theory using the gradient flow method. We propose a reference scale t0 for the SU(2) gauge theory satisfying Tex. This ref...
Etsuko Itou, Kei Iida, Tong-Gyu Lee
   Oct 2018   [Refereed]
The chemical potential (Tex) dependence of the topological susceptibility with two-color two-flavor QCD is studied. We find that at temperature Tex, where Tex denotes the critical temperature at zero chemical potential, the t...
Takehiro Hirakida, Etsuko Itou, Hiroaki Kouno
   May 2018
We study the equation of state of pure SU(Tex) gauge theory using Monte Carlo simulations. The scale-setting of lattice parameters has been carried by using the gradient flow. We propose a reference scale Tex for the SU(Tex) gauge theory sati...
Etsuko Itou, Sinya Aoki
   Jan 2017   [Refereed]
To obtain the precise values of the bulk quantities and transport coefficients in quark-gluon-plasma phase, we propose that a direct calculation of the renormalized energy-momentum tensor (EMT) on the lattice using the gradient flow. From one-p...
Sinya Aoki, Etsuko Itou, Keitaro Nagata
Int. J. Mod.Phys.A   31(35) 1650192   Dec 2016   [Refereed]
We study the entanglement entropy (EE) for pure gauge theories in 1+1 dimensions with the lattice regularization. Using the definition of the EE for lattice gauge theories proposed in a previous paper [1] (S. Aoki, T. Iritani, M. Nozaki, T. Num...
Etsuko Itou, Keitaro Nagata, Yoshiyuki Nakagawa, Atsushi Nakamura, V. I. Zakharov
Progress of Theoretical and Experimental Physics   6 061B01   Jan 2016   [Refereed]
We investigate the quantum entanglement entropy for the four-dimensional Euclidean SU(3) gauge theory. We present the first non-perturbative calculation of the entropic Tex-function (Tex) of SU(3) gauge theory in lattice Monte Carlo simulati...
Etsuko Itou, Hiroshi Suzuki, Yusuke Taniguchi, Takashi Umeda
Proceeding of science (Lattice2015)   303   Nov 2015   [Refereed]
Recently, we proposed a novel method to define and calculate the energy-momentum tensor (EMT) in lattice gauge theory on the basis of the Yang-Mills gradient flow [1]. In this proceedings, we summarize the basic idea and technical steps to obta...
Masakiyo Kitazawa, Masayuki Asakawa, Tetsuo Hatsuda, Takumi Iritani, Etsuko Itou, Hiroshi Suzuki
PoS LATTICE2015   162   Nov 2015   [Refereed]
We study the parametrization of lattice spacing and thermodynamics of SU(3) gauge theory on the basis of the Yang-Mills gradient flow on fine lattices. The lattice spacing of the Wilson gauge action is determined over a wide range $6.3\le\beta\...
Tatsuhiro Misumi, Takumi Iritani, Etsuko Itou
Proceeding of science (Lattice2015)   152   Oct 2015   [Refereed]
For the Tex-symmetric lattice QCD-like theory (Tex-QCD), in which Tex gauge theory is coupled with three fundamental Wilson quarks with flavor-dependent twisted boundary conditions, we calculate the expectation values of Polyakov loop...
Takumi Iritani, Etsuko Itou, Tatsuhiro Misumi
JHEP11(2015)159      Aug 2015   [Refereed]
We investigate QCD-like theory with exact center symmetry, with emphasis on the finite-temperature phase transition concerning center and chiral symmetries. On the lattice, we formulate center symmetric Tex gauge theory with three fundament...
Masakiyo Kitazawa, Masayuki Asakawa, Tetsuo Hatsuda, Takumi Iritani, Etsuko Itou, Hiroshi Suzuki
Proceeding of science (Lattice2014)   022   Dec 2014   [Refereed]
We analyze bulk thermodynamics and correlation functions of the energy-momentum tensor in pure Yang-Mills gauge theory using the energy-momentum tensor defined by the gradient flow and small flow time expansion. Our results on thermodynamic obs...
Etsuko Itou, Akio Tomiya
Proceeding of science (Lattice2014)   252   Nov 2014   [Refereed]
We show the numerical simulation result for the mass anomalous dimension of the SU(Tex) gauge theory coupled to Tex fundamental fermions. We use two independent methods, namely the step scaling method and the hyperscaling method of the D...
Etsuko Itou
Progress of Theoretical and Experimental Physics   4 043B08   Apr 2014   [Refereed]
We propose a novel renormalization scheme for the hadronic operators. The renormalization factor of the operator in this scheme is normalized by the correlation function at tree level in coordinate space. If we focus on the pseudo scalar operat...
Etsuko Itou, Kouji Kashiwa, Norihiro Nakamoto
   Mar 2014
We investigate the nonperturbative phase structure of five-dimensional SU(3) pure Yang-Mills theory on the lattice. We perform numerical simulations using the Wilson plaquette gauge action on an anisotropic lattice with a four-dimensional lattice ...
Masayuki Asakawa, Tetsuo Hatsuda, Etsuko Itou, Masakiyo Kitazawa, Hiroshi Suzuki
Phys. Rev. D 90, 011501 (2014)      Dec 2013   [Refereed]
A novel method to study the bulk thermodynamics in lattice gauge theory is proposed on the basis of the Yang-Mills gradient flow with a fictitious time t. The energy density (epsilon) and the pressure (P) of SU(3) gauge theory at fixed temperat...
Guido Cossu, Etsuko Itou, Hisaki Hatanaka, Yutaka Hosotani, Jun-Ichi Noaki
Proceeding of science (Lattice2013)   103   Nov 2013   [Refereed]
We explore the phase structure and symmetry breaking in four-dimensional SU(3) gauge theory with one spatial compact dimension on the lattice in the presence of fermions in the adjoint and fundamental representations with general boundary condi...
Etsuko Itou
Proceeding of science (Lattice2013)   005   Nov 2013   [Refereed]
We report the nonperturbative behavior of the twisted Polyakov loop (TPL) coupling constant for the SU(3) gauge theories defined by the ratio of Polyakov loop correlators in finite volume with twisted boundary condition. Carrying out the numeri...
Etsuko Itou
Proceeding of science (Lattice2013)   481   Nov 2013   [Refereed]
We propose a novel renormalization scheme for the hadronic operators. As an example, we show the numerical simulation result for the anomalous dimension of the pseudo scalar operator of the SU(3) gauge theory coupled to Nf = 12 fundamental ferm...
Etsuko Itou
Progress of Theoretical and Experimental Physics   8 083B01   Aug 2013   [Refereed]
We report the nonperturbative behavior of the twisted Polyakov loop (TPL) coupling constant for the SU(3) gauge theories defined by the ratio of Polyakov loop correlators in finite volume with twisted boundary condition. We reveal the vacuum st...
Kenji Ogawa, Tatsumi Aoyama, Hiroaki Ikeda, Etsuko Itou, Masafumi Kurachi, C. -J. David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Eigo Shintani, Takeshi Yamazaki
PoS Lattice2011:081,2011      Nov 2011   [Refereed]
Incorporated with twisted boundary condition, Polyakov loop correlators can give a definition of the renormalized coupling. We employ this scheme for the step scaling method (with step size s = 2) in the search of conformal fixed point of SU(3)...
Hiroshi Ohki, Tatsumi Aoyama, Etsuko Itou, Masafumi Kurachi, C. -J. David Lin, Hideo Matsufuru, Tetsuya Onogi, Eigo Shintani, Takeshi Yamazaki
PoS Lattice2010:066,2010      Nov 2010   [Refereed]
We present our preliminary study of the SU(2) gauge theory with 8 flavors of fermions in fundamental representation. This theory could be a candidate of the gauge theory with conformal fixed point. By using Wilson/Polyakov loop in a finite volu...
Etsuko Itou, Tatsumi Aoyama, Masafumi Kurachi, C. -J. David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Eigo Shintani, Takeshi Yamazaki
PoS Lattice2010:054,2010      Nov 2010   [Refereed]
We measure the renormalized coupling in the Twisted Polyakov loop scheme for SU(3) gauge theory coupled with Tex fundamental fermions. To find the infrared fixed point of this theory, we focus on the step scaling function for the renormali...
Erek Bilgici, Antonino Flachi, Etsuko Itou, Masafumi Kurachi, C. -J. David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Eigo Shintani, Takeshi Yamazaki
PoS LAT2009:063,2009      Oct 2009   [Refereed]
We present a non-perturbative study of the running coupling constant in the Twisted Polyakov Loop (TPL) scheme. We investigate how the systematic and statistical errors can be controlled {\it via} a feasibility study in SU(3) pure Yang-Mills th...
Erek Bilgici, Antonino Flachi, Etsuko Itou, Masafumi Kurachi, C. -J David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Takeshi Yamazaki
Phys.Rev.D80:034507,2009      Feb 2009   [Refereed]
We propose a new renormalization scheme of the running coupling constant in general gauge theories using the Wilson loops. The renormalized coupling constant is obtained from the Creutz ratio in lattice simulations and the corresponding perturb...
Erek Bilgici, Antonino Flachi, Etsuko Itou, Masafumi Kurachi, C. -J David Lin, Hideo Matsufuru, Hiroshi Ohki, Tetsuya Onogi, Takeshi Yamazaki
PoS LATTICE2008:247,2008      Aug 2008   [Refereed]
We propose a new method to compute the running coupling constant of gauge theories on the lattice. We first give the definition of the running coupling in the new scheme using the Wilson loops in a finite volume, and explain how the running of ...
Takeshi Higashi, Kiyoshi Higashijima, Etsuko Itou
SUSY 2007 Proceedings (Karlsruhe 2007, SUSY 2007)   522-525   Oct 2007   [Refereed]
We construct supersymmetric conformal sigma models in three dimensions. Nonlinear sigma models in three dimensions are nonrenormalizable in perturbation theory. We use the Wilsonian renormalization group equation method, which is one of the non...
Takeshi Higashi, Etsuko Itou, Taichiro Kugo
Prog.Theor.Phys.118:1115-1125,2007      Sep 2007   [Refereed]
The Wilson effective action for general Yang-Mills gauge theory is shown to satisfy the usual form of Batalin-Vilkovisky (BV) master equation, despite that a momentum cutoff apparently breaks the gauge invariance. In the case of Abelian gauge t...
Takeshi Higashi, Kiyoshi Higashijima, Etsuko Itou
Progress of Theoretical Physics   117(6) 1139-1156   Jun 2007   [Refereed]
We construct novel conformal sigma models in three dimensions. Nonlinear sigma models in three dimensions are nonrenormalizable in perturbation theory. We use Wilsonian renormalization group equation method to find the fixed points. Existence o...
Etsuko Itou, Yuji Kajiyama, Jisuke Kubo
AIPConf.Proc.903:389-392,2007      Nov 2006   [Refereed]
We consider a supersymmetric extension of the standard model, which possess a family symmetry based on a binary dihedral group Q6, and investigate the consequences of the family symmetry on the mixing of fermions, FCNCs and the stability of pro...
Yuji Kajiyama, Etsuko Itou, Jisuke Kubo
Nucl.Phys. B743 (2006) 74-103      Nov 2005   [Refereed]
Family symmetry could explain large mixing of the atmospheric neutrinos. The same symmetry could explain why the flavor changing current processes in supersymmetric standard models can be so suppressed. It also may be able to explain why the pr...
Kiyoshi Higashijima, Etsuko Itou
Journal of Physics A (Proceedings of Renormalization Group 2005)   39(25)    Nov 2005   [Refereed]
In this paper, we study three dimensional NLTexMs within two kind of nonperturbative methods; WRG and large-N expansion. First, we investigate the renormalizability of some NLTexMs using WRG equation. We find that some models have a n...
Kiyoshi Higashijima, Etsuko Itou, Makoto Tsuzuki
   May 2005
Non-perturbative renormalization group approach suggests that a large class of nonlinear sigma models are renormalizable in three dimensional space-time, while they are non-renormalizable in perturbation theory. Tex supersymmetric nonline...
Etsuko Itou
Proceedings of 12th International Conference on Supersymmetry Conference   911-914   Sep 2004   [Refereed]
We find a class of fixed point theory for 2- and 3-dimensional non-linear sigma models using Wilsonian renormalization group (WRG) approach. In 2-dimensional case, the fixed point theory is equivalent to the Witten's semi-infinite cigar model. ...
Kiyoshi Higashijima, Etsuko Itou
Prog.Theor.Phys. 109 (2003) 751-764      Feb 2003   [Refereed]
The Wilsonian renormalization group (WRG) equation is used to derive a new class of scale invariant field theories with nonvanishing anomalous dimensions in 2-dimensional Tex supersymmetric nonlinear sigma models. When the coordinates ...
Kiyoshi Higashijima, Etsuko Itou
Prog.Theor.Phys. 108 (2002) 737-753      May 2002   [Refereed]
We derive the Wilsonian renormalization group equation in two dimensional Tex supersymmetric nonlinear sigma models. This equation shows that the sigma models on compact Einstein Kähler manifolds are aymptotically free. This result...
Kiyoshi Higashijima, Etsuko Itou, Muneto Nitta
Prog.Theor.Phys. 108 (2002) 185-202      Mar 2002   [Refereed]
Riemann normal coordinates (RNC) are unsuitable for \kahler manifolds since they are not holomorphic. Instead, \kahler normal coordinates (KNC) can be defined as holomorphic coordinates. We prove that KNC transform as a holomorphic tangent vect...

Conference Activities & Talks

 
Lattice study for the CP(N−1) models on R × S1 [Invited]
Etsuko Itou
Topological solitons, Nonperturbative Gauge Dynamics and Confinement 2   18 Jul 2019   
Topological susceptibility of two-color QCD at low temperature and high density
Etsuko Itou
The 17th International Conference on QCD in Extreme Conditions (xQCD)   24 Jun 2019   
Resurgence and fractional instanton of the SU(3) gauge theory in weak coupling regime
Etsuko Itou
The 37th International Symposium on Lattice Field Theory   18 Jun 2019   
Phase diagram of two-color QCD at finite temperature and density
Etsuko Itou
10 Oct 2018   
Topology of two-color QCD at low temperature and high density
Etsuko Itou
9 Aug 2018   
Topology of two-color QCD at low temperature and high density
Etsuko Itou
The 36th International Symposium on Lattice Field Theory   26 Jul 2018   
Phase diagram of two-color QCD at finite temperature and density using exact algorithm
Etsuko Itou
New Frontiers in QCD 2018 - Confinement, Phase Transition, Hadrons, and Hadron Interactions -   5 Jun 2018   
QCD Thermodynamics On The Lattice from The Gradient Flow [Invited]
Etsuko Itou
26th International Nuclear Physics Conference (INPC2016)   16 Sep 2016   
Conformal field theory and energy-momentum tensor on the lattice [Invited]
Etsuko Itou
CERN workshop:Emergent Properties of Space-time   30 Jun 2016   
Numerical study on the entropic c-function for SU(3) gauge theory
Etsuko Itou
17 Jun 2016   
Thermodynamics of SU(3) gauge theory using gradient flow
Etsuko Itou
6 Nov 2015   
The mass anomalous dimension of the SU(3) Nf=12 theory from the step scaling and hyperscaling methods [Invited]
Etsuko Itou
Workshop on Lattice Gauge Theory Beyond the Standard Model,   25 Jun 2015   
Quantum entanglement entropy for SU(3) gauge theories [Invited]
Etsuko Itou
International workshop: Hadrons and Hadron Interactions in QCD { Effective theories and Lattice { (HHIQCD2015)   6 Mar 2015   
Exact center symmetric model for Nf=3 QCD and thermodynamics using the Wilson flow [Invited]
Etsuko Itou
19 Feb 2015   
Numerical study on quantum entanglement entropy in 4d SU(3) gauge theories [Invited]
Etsuko Itou
"10sor network workshop"| Field 2 x 5 joint workshop on new algorithms for quantum manybody problems   14 Feb 2015   
Quantum entanglement entropy for SU(3) gauge theories [Invited]
Etsuko Itou
CERN Workshop: Conceptual advances in lattice gauge theory   25 Jul 2014   
The Twisted Polyakov Loop Coupling and the Search for an IR Fixed Point [Invited]
Etsuko Itou
31st International Symposium on Lattice Field Theory LATTICE 2013   3 Aug 2013   
Recent study on the conformal fixed point in the SU(3) gauge theory [Invited]
Etsuko Itou
Seminar   7 Feb 2013   
Study on the conformal window using the lattice simulation [Invited]
Etsuko Itou
21 Dec 2011   
Conformal fixed point of SU(3) gauge theory with 12 fundamental massless fermions [Invited]
Etsuko Itou
Workshop on Lattice Meets Experiment 2011: Beyond the Standard Model   15 Oct 2011   
Infrared fixed point for many flavor SU(N) gauge theory [Invited]
Etsuko Itou
Renormalization Group Approach from Ultra Cold Atoms to the Hot QGP   25 Aug 2011   
The IR behavior of a large flavor gauge theory [Invited]
Etsuko Itou
Workshop on lattice simulation for physics beyond the Standard Model   12 Nov 2010   
The IR behavior of a large flavor SU(3) gauge theory [Invited]
Etsuko Itou
25 Sep 2010   

Association Memberships