Abelian Hopfions of the CP^n model on R^{2n+1} and a fractionally powered topological lower bound

Eugen Radu, D. H. Tchrakian, Yisong Yang

Regarding the Skyrme-Faddeev model on ${\mathbb{R}}^3$ as a $\mathbb{C}{\mathbb{P}}^1$ sigma model, we propose $\mathbb{C}{\mathbb{P}}^n$ sigma models on ${\mathbb{R}}^{2n+1}$ as generalisatio…