363 citations · 4k across the 80 of their papers we have counts for
82 papers
Magnetic Q-balls
A. J. Balseyro Sebastian, Keisuke Ohashi, Muneto Nitta
We study charged soliton branches in quasi-one-dimensional chiral magnetic systems with Dzyaloshinskii--Moriya (DM) interaction, easy-axis anisotropy, and Zeeman coupling. The same…
Ghost-Free Stable Minkowski Vacua in Lovelock Compactifications on Irreducible Symmetric Spaces
Keisuke Ohashi
We study the compactification of higher-dimensional Lovelock gravity on compact irreducible symmetric spaces, focusing on conditions under which a physically healthy four-dimension…
Fractional instantons in 2d model and 4d Yang-Mills theory with 't Hooft twists
Yui Hayashi, Tatsuhiro Misumi, Muneto Nitta +2
We derive the explicit formula for fractional BPS lumps (or fractional instantons) in the nonlinear sigma model on a two-dimensional torus under various shift-c…
String junctions in flag manifold sigma model
Yuki Amari, Toshiaki Fujimori, Muneto Nitta +1
We numerically construct a stable three-string junction of Y-shape in a flag manifold nonlinear sigma model on .
Moduli Spaces of Instantons in Flag Manifold Sigma Models -- Vortices in Quiver Gauge Theories
Toshiaki Fujimori, Muneto Nitta, Keisuke Ohashi
In this paper, we discuss lumps (sigma model instantons) in flag manifold sigma models. In particular, we focus on the moduli space of BPS lumps in general Kähler flag manifold sig…
Deriving dilaton potential in improved holographic QCD from chiral condensate
Koji Hashimoto, Keisuke Ohashi, Takayuki Sumimoto
We derive an explicit form of the dilaton potential in improved holographic QCD (IHQCD) from the QCD lattice data of the chiral condensate as a function of the quark mass. This est…