396 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyoto UniversityJP38 papers
- The University of TokyoJP29 papers
- Nagoya UniversityJP26 papers
- Kyushu UniversityJP24 papers
- The University of OsakaJP24 papers
- Tokai UniversityJP24 papers
- Boston UniversityUS23 papers
- California State University, Dominguez HillsUS23 papers
- Chonnam National UniversityKR23 papers
- Duke UniversityUS23 papers
- Gifu UniversityJP23 papers
- Institute for Cosmic Ray ResearchJP23 papers
13 papers · 1 filter
Path optimization method for the sign problem caused by fermion determinant
Kazuki Hisayoshi, Kouji Kashiwa, Yusuke Namekawa +1
The path optimization method with machine learning is applied to the one-dimensional massive lattice Thirring model, which has the sign problem caused by the fermion determinant. T…
Application of the path optimization method to a discrete spin system
Kouji Kashiwa, Yusuke Namekawa, Akira Ohnishi +1
The path optimization method, which is proposed to control the sign problem in quantum field theories with continuous degrees of freedom by machine learning, is applied to a spin m…
Improving efficiency of the path optimization method for a gauge theory
Yusuke Namekawa, Kouji Kashiwa, Hidefumi Matsuda +2
We investigate efficiency of a gauge-covariant neural network and an approximation of the Jacobian in optimizing the complexified integration path toward evading the sign problem i…
Gauge invariant input to neural network for path optimization method
Yusuke Namekawa, Kouji Kashiwa, Akira Ohnishi +1
We investigate the efficiency of a gauge invariant input to a neural network for the path optimization method. While the path optimization with a completely gauge-fixed link-variab…
Persistent homology analysis for dense QCD effective model with heavy quarks
Kouji Kashiwa, Takehiro Hirakida, Hiroaki Kouno
The isospin chemical potential region is known as the sign-problem free region of quantum chromodynamics (QCD). In this paper, we introduce the isospin chemical potential to the th…
Path optimization for gauge theory with complexified parameters
Kouji Kashiwa, Yuto Mori
In this article, we apply the path optimization method to handle the complexified parameters in the 1+1 dimensional pure gauge theory on the lattice. Complexified parameters…
The path optimization for the sign problem of low dimensional QCD
Yuto Mori, Kouji Kashiwa, Akira Ohnishi
The path optimization has been proposed to weaken the sign problem which appears in some field theories such as finite density QCD. In this method, we optimize the integration path…
Evading the model sign problem in the PNJL model with repulsive vector-type interaction via path optimization
Akira Ohnishi, Yuto Mori, Kouji Kashiwa
We discuss the sign problem in the Polyakov loop extended Nambu--Jona-Lasinio model with repulsive vector-type interaction by using the path optimization method. In this model, bot…
Path optimization in 0+1 dimensional QCD at finite density
Yuto Mori, Kouji Kashiwa, Akira Ohnishi
We investigate the sign problem in 0+1 dimensional QCD at finite chemical potential by using the path optimization method. The SU(3) link variable is complexified to the SL(3,$\mat…
Application of the path optimization method to the sign problem in an effective model of QCD with a repulsive vector-type interaction
Kouji Kashiwa, Yuto Mori, Akira Ohnishi
The path optimization method is applied to a QCD effective model with the Polyakov loop and the repulsive vector-type interaction at finite temperature and density to circumvent th…
Path optimization method with use of neural network for the sign problem in field theories
Akira Ohnishi, Yuto Mori, Kouji Kashiwa
We investigate the sign problem in field theories by using the path optimization method with use of the neural network. For theories with the sign problem, integral in the complexi…
Persistent homology analysis of deconfinement transition in effective Polyakov-line model
Takehiro Hirakida, Kouji Kashiwa, Junpei Sugano +3
The persistent homology analysis is applied to the effective Polyakov-line model on a rectangular lattice to investigate the confinement-deconfinement nature. The lattice data are…
Lefschetz thimbles in fermionic effective models with repulsive vector-field
Yuto Mori, Kouji Kashiwa, Akira Ohnishi
We discuss two problems in complexified auxiliary fields in fermionic effective models, the auxiliary sign problem associated with the repulsive vector-field and the choice of the…