M Eto, Y Hamada, M Nitta - Journal of High Energy Physics, 2023 - Springer
A bstract We study various composites of global solitons consisting of domain walls, strings, and monopoles in linear O (N) models with N= 2 and 3. Spontaneous symmetry breaking …
We report the experimental formation of a fractional vortex generated by using a thin superconducting bi-layer in the form of a niobium bi-layer, observed as a magnetic flux …
M Eto, Y Hamada, M Nitta - Journal of High Energy Physics, 2022 - Springer
A bstract We find that a Z-string is stable in a wide range of parameter space of the two Higgs doublet model due to a split into a pair of two topological Z-strings with fractional Z …
Y Tanaka, T Yanagisawa - Journal of the Physical Society of Japan, 2010 - journals.jps.jp
Chiral superconductivity emerges in three-band superconductors when interband interactions are much smaller than intraband interactions and either one or three interband …
We study the effects of the internal coherent (Rabi) coupling in vortex lattices in two- component BECs under rotation. We find how the vortex lattices without the Rabi coupling …
M Kobayashi, M Eto, M Nitta - Physical review letters, 2019 - APS
We study the Berezinskii-Kosterlitz-Thouless (BKT) transition of two-component Bose mixtures in two spatial dimensions. When phases of both components are decoupled, half …
A bstract We study fractional Skyrmions in a ℂP 2 baby Skyrme model with a generalization of the easy-plane potential. By numerical methods, we find stable, metastable, and unstable …
3 P 2 superfluids realized in neutron stars are the largest topological quantum matters in our universe. We establish the existence and stability of non-Abelian half-quantum vortices …
We developed a minimal method of forming and detecting a fractional magnetic flux quantum in a two-component superconductor fabricated using an ultra-thin niobium bilayer …