35 citations · 258 across the 36 of their papers we have counts for
36 papers
Gravitational polarization of test-mass potential in equilibrium polytropic sheets with non-negative polytropic indexes
Yuta Ito
Gravitational polarization is examined for equilibrium self-gravitating polytropic sheets perturbed by gravitational field due to test mass sheet. We find equilibrium solutions to…
Color superconductivity on the lattice -- analytic predictions from QCD in a small box
Takeru Yokota, Yuta Ito, Hideo Matsufuru +4
We investigate color superconductivity on the lattice using the gap equation for the Cooper pair condensate. The weak coupling analysis is justified by choosing the physical size o…
Progress in the numerical studies of the type IIB matrix model
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Kohta Hatakeyama +5
The type IIB matrix model, also known as the IKKT model, has been proposed as a promising candidate for a non-perturbative formulation of superstring theory. Based on this proposal…
Complex Langevin studies of the emergent space-time in the type IIB matrix model
Kohta Hatakeyama, Konstantinos Anagnostopoulos, Takehiro Azuma +5
The type IIB matrix model has been proposed as a non-perturbative definition of superstring theory since 1996. We study a simplified model that describes the late time behavior of…
A new phase in the Lorentzian type IIB matrix model and the emergence of continuous space-time
Mitsuaki Hirasawa, Konstantinos Anagnostopoulos, Takehiro Azuma +5
The Lorentzian type IIB matrix model is a promising candidate for a non-perturbative formulation of superstring theory. In previous studies, Monte Carlo calculations provided inter…
Relationship between the Euclidean and Lorentzian versions of the type IIB matrix model
Kohta Hatakeyama, Konstantinos Anagnostopoulos, Takehiro Azuma +5
The type IIB matrix model was proposed as a non-perturbative formulation of superstring theory in 1996. We simulate a model that describes the late time behavior of the IIB matrix…
A new technique for solving the freezing problem in the complex Langevin simulation of 4D SU(2) gauge theory with a theta term
Akira Matsumoto, Kohta Hatakeyama, Mitsuaki Hirasawa +4
We apply the complex Langevin method (CLM) to overcome the sign problem in 4D SU(2) gauge theory with a theta term extending our previous work on the 2D U(1) case. The topology fre…
Flavor number dependence of QCD at finite density by the complex Langevin method
Yusuke Namekawa, Yuhma Asano, Yuta Ito +6
We discuss the flavor number dependence of QCD at low temperature and high density by the complex Langevin method. In our previous work, the complex Langevin method is confirmed to…
Color superconductivity in a small box: a complex Langevin study
Shoichiro Tsutsui, Yuhma Asano, Yuta Ito +5
It is expected that the color superconductivity (CSC) phase appears in QCD at low temperature and high density. On the basis of the lattice perturbation theory, a possible paramete…
Perturbative predictions for color superconductivity on the lattice
Takeru Yokota, Yuhma Asano, Yuta Ito +5
We develop a new method to investigate color superconductivity (CSC) on the lattice based on the Thouless criterion, which amounts to solving the linearized gap equation without im…
Complex Langevin studies of the dynamical compactification of extra dimensions in the Euclidean IKKT matrix model
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito +3
The type IIB matrix model, also known as the IKKT matrix model, is a promising candidate for a nonperturbative formulation of superstring theory. In this talk we study the Euclidea…
Reduction of contaminants originating from primary beam by improving the beam stoppers in GARIS-II
Sota Kimura, Daiya Kaji, Yuta Ito +4
Two independent beam stoppers have been developed for improving the beam separation of the gas-filled recoil ion separator GARIS-II. Performance evaluation of these supplemental be…
Dynamical Compactification of Extra Dimensions in the Euclidean IKKT Matrix Model via Spontaneous Symmetry Breaking
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito +3
The IKKT matrix model has been conjectured to provide a promising nonperturbative formulation of superstring theory. In this model, spacetime emerges dynamically from the microscop…
Self-similar orbit-averaged Fokker-Planck equation for isotropic spherical dense clusters (iii) application of pre-collapse solution to Galactic globular clusters
Yuta Ito
This is the third paper of a series of our works on the self-similar orbit-averaged Fokker-Planck (OAFP) equation. The first paper provided an accurate spectral solution of the equ…
Self-similar orbit-averaged Fokker-Planck equation for isotropic spherical dense clusters (ii) physical properties and negative heat capacity of pre-collapse core
Yuta Ito
This is the second paper of a series of our works on the self-similar orbit-averaged Fokker-Planck (OAFP) equation and details physical properties of isotropic pre-collapse solutio…
Complex Langevin analysis of the spontaneous breaking of 10D rotational symmetry in the Euclidean IKKT matrix model
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito +3
The IKKT matrix model is a promising candidate for a nonperturbative formulation of superstring theory, in which spacetime is conjectured to emerge dynamically from the microscopic…
Exploring the QCD phase diagram at finite density by the complex Langevin method on a lattice
Shoichiro Tsutsui, Yuta Ito, Hideo Matsufuru +3
We explore the QCD phase diagram at finite density with four-flavor staggered fermions using the complex Langevin method, which is a promising approach to overcome the sign problem…
Dynamical compactification of extra dimensions in the Euclidean type IIB matrix model: A numerical study using the complex Langevin method
Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito +2
The type IIB matrix model is conjectured to be a nonperturbative definition of type IIB superstring theory. In this model, spacetime is a dynamical quantity and compactification of…
On the structure of the emergent 3d expanding space in the Lorentzian type IIB matrix model
Toshihiro Aoki, Mitsuaki Hirasawa, Yuta Ito +2
The emergence of (3+1)-dimensional expanding space-time in the Lorentzian type IIB matrix model is an intriguing phenomenon which was observed in Monte Carlo studies of this model.…
Ionization age of iron ejecta in the Galactic Type Ia supernova remnant G306.3-0.9
Makoto Sawada, Katsuhiro Tachibana, Hiroyuki Uchida +5
We present a 190 ks observation of the Galactic supernova remnant (SNR) G306.3-0.9 with Suzaku. To study ejecta properties of this possible Type Ia SNR, the absolute energy scale a…
Exploring the phase diagram of finite density QCD at low temperature by the complex Langevin method
Yuta Ito, Hideo Matsufuru, Jun Nishimura +3
Monte Carlo studies of QCD at finite density suffer from the sign problem, which becomes easily uncontrollable as the chemical potential is increased even for a moderate lattic…
Can the complex Langevin method see the deconfinement phase transition in QCD at finite density?
Shoichiro Tsutsui, Yuta Ito, Hideo Matsufuru +3
Exploring the phase diagram of QCD at finite density is a challenging problem since first-principle calculations based on standard Monte Carlo methods suffer from the sign problem.…
A generalized Landau kinetic equation for weakly-coupled probability distribution of N-stars in dense star cluster
Yuta Ito
The secular evolution of a collisional star cluster of -'point' stars have been conventionally discussed based on cumulative two-body relaxation process. The relaxation process…
An orbit-averaged generalized-Landau kinetic equation for the relaxation evolution of finite weakly-coupled star clusters: `Discreteness' stochastic acceleration and anti-normalization
Yuta Ito
In the relaxation evolution of finite weakly-coupled star clusters, stars undergo stochastic acceleration due to the `discreteness' of the clusters (the finiteness of the total ste…