Multicomponent superconductivity based on multiband superconductors

Y Tanaka - Superconductor Science and Technology, 2015 - iopscience.iop.org
Multicomponent superconductivity is realized in multiband superconductors when an
interband pairing interaction is considerably weaker than the intraband interactions. There is …

Creation and detection of skyrmions in a Bose-Einstein condensate

LS Leslie, A Hansen, KC Wright, BM Deutsch… - Physical review …, 2009 - APS
We present the first experimental realization and characterization of two-dimensional
Skyrmions and half-Skyrmions in a spin-2 Bose-Einstein condensate. The continuous …

Composite topological solitons consisting of domain walls, strings, and monopoles in O (N) models

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 …

[HTML][HTML] Experimental formation of a fractional vortex in a superconducting bi-layer

Y Tanaka, H Yamamori, T Yanagisawa, T Nishio… - … and its applications, 2018 - Elsevier
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 …

Stable Z-strings with topological polarization in two Higgs doublet model

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 …

Crossover between Integer and Fractional Vortex Lattices in Coherently Coupled<? format?> Two-Component Bose-Einstein Condensates

M Cipriani, M Nitta - Physical review letters, 2013 - APS
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 …

Berezinskii-Kosterlitz-Thouless Transition of Two-Component Bose Mixtures with Intercomponent Josephson 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 …

Fractional Skyrmion molecules in a ℂPN− 1 model

Y Akagi, Y Amari, SB Gudnason, M Nitta… - Journal of High Energy …, 2021 - Springer
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 …

Non-Abelian half-quantum vortices in topological superfluids

Y Masaki, T Mizushima, M Nitta - Physical Review B, 2022 - APS
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 …

[HTML][HTML] Effective method of forming and detecting a fractional magnetic flux quantum

Y Tanaka, H Yamamori, S Arisawa - Physica C: Superconductivity and its …, 2021 - Elsevier
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 …